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Poner un recuadro en celda - MyBB-Es.com
Contrata servicios web en ougcNetwork.
Esta un poco dificil no sabiendo que borraste, te dejo el global.css de ese tema (es como cuando recien instalas):
body {
	background: url(images/gamenow/bg.gif) top left repeat;
	color: #000;
	font-family: Tahoma, Arial, Sans-Serif;
	font-size: 13px;
	text-align: center; /* IE 5 fix */
	line-height: 1.4;
	margin: 0;
	padding: 0;
}

a:link {
	color: #993333;
	text-decoration: none;
}

a:visited {
	color: #993333;
	text-decoration: none;
}

a:hover, a:active {
	color: #738992;
	text-decoration: underline;
}

#container {
	width: 91%;
	background: #fff;
	border: 1px solid #e4e4e4;
	color: #000000;
	margin: auto auto;
	padding: 20px;
	text-align: left; /* IE 5 fix */
}

#content {
	/* FIX: Make internet explorer wrap correctly */
	width: auto !important;

}

table {
	color: #000000;
	font-family: Tahoma, Arial, Sans-Serif;
	font-size: 13px;
}

.tborder {
	width: 100%;
	margin: auto auto;
}

.thead {
	background: #d35e00 url(images/gamenow/thead.png) top left repeat-x;
	color: #fff;
	padding: 8px;
	border-top: 1px solid #191919;
	border-left: 1px solid #191919;
	border-right: 1px solid #191919;
	-moz-border-radius-topleft: 5px;
	-moz-border-radius-topright: 5px;
	-webkit-border-top-left-radius: 5px;
	-webkit-border-top-right-radius: 5px;
	border-top-left-radius: 5px;
	border-top-right-radius: 5px;
}

.thead a:link {
	color: #ffffff;
	text-decoration: none;
}

.thead a:visited {
	color: #ffffff;
	text-decoration: none;
}

.thead a:hover, .thead a:active {
	color: #ffffff;
	text-decoration: underline;
}

.tcat {
	background: url(images/gamenow/tcat.png) top left repeat-x;
	color: #636363;
	font-size: 12px;
}

.tcat a:link {
	color: #fff;
}

.tcat a:visited {
	color: #fff;
}

.tcat a:hover, .tcat a:active {
	color: #fff;
}

.trow1 {
	background: #f1f3f5 url(images/gamenow/trow.png) bottom left repeat-x;
	border-bottom: 1px solid #cccccc;
}

.trow2 {
	background: #f1f3f5 url(images/gamenow/trow.png) bottom left repeat-x;
	border-bottom: 1px solid #cccccc;
}

.trow_shaded {
	background: #ffdde0;
}

.trow_selected td {
	background: #FFFBD9;
}

.trow_sep {
	background: #e5e5e5;
	color: #000;
	font-size: 12px;
	font-weight: bold;
}

.tfoot {
	background: #191919 url(images/gamenow/thead.png) top left repeat-x;
	color: #ffffff;
	padding: 8px;
	border-bottom: 1px solid #191919;
	border-left: 1px solid #191919;
	border-right: 1px solid #191919;
	-moz-border-radius-bottomleft: 5px;
	-moz-border-radius-bottomright: 5px;
	-webkit-border-bottom-left-radius: 5px;
	-webkit-border-bottom-right-radius: 5px;
	border-bottom-left-radius: 5px;
	border-bottom-right-radius: 5px;
}

.tfoot a:link {
	color: #ffffff;
	text-decoration: none;
}

.tfoot a:visited {
	color: #ffffff;
	text-decoration: none;
}

.tfoot a:hover, .tfoot a:active {
	color: #ffffff;
	text-decoration: underline;
}

.bottommenu {
	background: #efefef;
	color: #000000;
	border: 1px solid #4874a3;
	padding: 10px;
}

.navigation {
	color: #000000;
	font-size: 13px;
	font-weight: bold;
}

.navigation a:link {
	text-decoration: none;
}

.navigation a:visited {
	text-decoration: none;
}

.navigation a:hover, .navigation a:active {
	text-decoration: none;
}

.navigation .active {
	color: #000000;
	font-size: 13px;
	font-weight: bold;
}

.smalltext {
	font-size: 11px;
}

.largetext {
	font-size: 16px;
	font-weight: bold;
}

input.textbox {
	background: #ffffff;
	color: #000000;
	border: 1px solid #0f5c8e;
	padding: 1px;
}

textarea {
	background: #ffffff;
	color: #000000;
	border: 1px solid #0f5c8e;
	padding: 2px;
	font-family: Tahoma, Arial, Sans-Serif;
	line-height: 1.4;
	font-size: 13px;
}

select {
	background: #ffffff;
	border: 1px solid #0f5c8e;
}

.editor {
	background: #f1f1f1;
	border: 1px solid #ccc;
}

.editor_control_bar {
	background: #fff;
	border: 1px solid #0f5c8e;
}

.autocomplete {
	background: #fff;
	border: 1px solid #000;
	color: black;
}

.autocomplete_selected {
	background: #adcee7;
	color: #000;
}

.popup_menu {
	background: #ccc;
	border: 1px solid #000;
}

.popup_menu .popup_item {
	background: #fff;
	color: #000;
}

.popup_menu .popup_item:hover {
	background: #C7DBEE;
	color: #000;
}

.trow_reputation_positive {
	background: #ccffcc;
}

.trow_reputation_negative {
	background: #ffcccc;
}

.reputation_positive {
	color: green;
}

.reputation_neutral {
	color: #444;
}

.reputation_negative {
	color: red;
}

.invalid_field {
	border: 1px solid #f30;
	color: #f30;
}

.valid_field {
	border: 1px solid #0c0;
}

.validation_error {
	background: url(images/gamenow/invalid.gif) no-repeat center left;
	color: #f30;
	margin: 5px 0;
	padding: 5px;
	font-weight: bold;
	font-size: 11px;
	padding-left: 22px;
}

.validation_success {
	background: url(images/gamenow/valid.gif) no-repeat center left;
	color: #00b200;
	margin: 5px 0;
	padding: 5px;
	font-weight: bold;
	font-size: 11px;
	padding-left: 22px;
}

.validation_loading {
	background: url(images/gamenow/spinner.gif) no-repeat center left;
	color: #555;
	margin: 5px 0;
	padding: 5px;
	font-weight: bold;
	font-size: 11px;
	padding-left: 22px;
}

/* Additional CSS (Master) */
img {
	border: none;
}

.clear {
	clear: both;
}

.hidden {
	display: none;
	float: none;
	width: 1%;
}

.hiddenrow {
	display: none;
}

.selectall {
	background-color: #FFFBD9;
	font-weight: bold;
	text-align: center;
}

.float_left {
	float: left;
}

.float_right {
	float: right;
}

.menu ul {
	list-style: none;
	margin: 0;
}

.menu li {
	display: inline;
	padding-left: 5px;
}

.menu img {
	padding-right: 5px;
	vertical-align: top;
}

#panel .links {
	margin: 0;
	float: right;
}

.expcolimage {
	float: right;
	width: auto;
	vertical-align: middle;
	margin-top: 3px;
}

img.attachment {
	border: 1px solid #E9E5D7;
	padding: 2px;
}

hr {
	background-color: #000000;
	color: #000000;
	height: 1px;
	border: 0px;
}

#copyright {
	font: 11px Verdana, Arial, Sans-Serif;
	margin: 0;
	padding: 10px 0 0 0;
}

#debug {
	float: right;
	text-align: right;
	margin-top: 0;
}

blockquote {
	border: 1px solid #ccc;
	margin: 0;
	background: #fff;
	padding: 4px;
}

blockquote cite {
	font-weight: bold;
	border-bottom: 1px solid #ccc;
	font-style: normal;
	display: block;
	margin: 4px 0;
}

blockquote cite span {
	float: right;
	font-weight: normal;
}

blockquote cite span.highlight {
	float: none;
	font-weight: bold;
	padding-bottom: 0;
}

.codeblock {
	background: #fff;
	border: 1px solid #ccc;
	padding: 4px;
}

.codeblock .title {
	border-bottom: 1px solid #ccc;
	font-weight: bold;
	margin: 4px 0;
}

.codeblock code {
	overflow: auto;
	height: auto;
	max-height: 200px;
	display: block;
	font-family: Monaco, Consolas, Courier, monospace;
	font-size: 13px;
}

.subforumicon {
	border: 0;
	vertical-align: middle;
}

.separator {
	margin: 5px;
	padding: 0;
	height: 0px;
	font-size: 1px;
	list-style-type: none;
}

form {
	margin: 0;
	padding: 0;
}

.popup_menu .popup_item_container {
	margin: 1px;
	text-align: left;
}

.popup_menu .popup_item {
	display: block;
	padding: 3px;
	text-decoration: none;
	white-space: nowrap;
}

.popup_menu a.popup_item:hover {
	text-decoration: none;
}

.autocomplete {
	text-align: left;
}

.subject_new {
	font-weight: bold;
}

.highlight {
	background: #FFFFCC;
	padding-top: 3px;
	padding-bottom: 3px;
}

.pm_alert {
	background: #FFF6BF;
	border: 1px solid #FFD324;
	text-align: center;
	padding: 5px 20px;
	margin-bottom: 15px;
	font-size: 11px;
}

.red_alert {
	background: #FBE3E4;
	border: 1px solid #A5161A;
	color: #A5161A;
	text-align: center;
	padding: 5px 20px;
	margin-bottom: 15px;
	font-size: 11px;
}

.high_warning {
	color: #CC0000;
}

.moderate_warning {
	color: #F3611B;
}

.low_warning {
	color: #AE5700;
}

div.error {
	padding: 5px 10px;
	border-top: 2px solid #FFD324;
	border-bottom: 2px solid #FFD324;
	background: #FFF6BF;
	font-size: 12px;
}

div.error p {
	margin: 0;
	color: #000;
	font-weight: normal;
}

div.error p em {
	font-style: normal;
	font-weight: bold;
	padding-left: 24px;
	display: block;
	color: #C00;
	background: url(images/gamenow/error.gif) no-repeat 0;
}

div.error.ul {
	margin-left: 24px;
}

.online {
	color: #15A018;
}

.offline {
	color: #C7C7C7;
}

.pagination {
	font-size: 11px;
	padding-top: 10px;
	margin-bottom: 5px;
}

.tfoot .pagination, .tcat .pagination {
	padding-top: 0;
}
.pagination .pages {
	font-weight: bold;
}

.pagination .pagination_current, .pagination a {
	padding: 2px 6px;
	margin-bottom: 3px;
}

.pagination a {
	border: 1px solid #81A2C4;
}

.pagination .pagination_current {
	background: #F5F5F5;
	border: 1px solid #81A2C4;
	font-weight: bold;
	color: #000;
}

.pagination a:hover {
	background: #F5F5F5;
	text-decoration: none;
}

.thread_legend, .thread_legend dd {
	margin: 0;
	padding: 0;
}

.thread_legend dd {
	padding-bottom: 4px;
	margin-right: 15px;
}

.thread_legend img {
	margin-right: 4px;
	vertical-align: bottom;
}

.forum_legend, .forum_legend dt, .forum_legend dd {
	margin: 0;
	padding: 0;
}

.forum_legend dd {
	float: left;
	margin-right: 10px;
}

.forum_legend dt {
	margin-right: 10px;
	float: left;
}

.success_message {
	color: #00b200;
	font-weight: bold;
	font-size: 10px;
	margin-bottom: 10px;
}

.error_message {
	color: #C00;
	font-weight: bold;
	font-size: 10px;
	margin-bottom: 10px;
}

.post_body {
	padding: 5px;
}

.post_content {
	padding: 5px 10px;
}

.quick_jump {
	background: url(images/gamenow/jump.gif) no-repeat 0;
	width: 13px;
	height: 13px;
	padding-left: 13px; /* amount of padding needed for image to fully show */
	vertical-align: middle;
	border: none;
}

.repbox {
	font-size:16px;
	font-weight: bold;
	padding:5px 7px 5px 7px;
}

._neutral {
	background-color:#FAFAFA;
	color: #999999;
	border:1px solid #CCCCCC;
}

._minus {
	background-color: #FDD2D1;
	color: #CB0200;
	border:1px solid #980201;
}

._plus {
	background-color:#E8FCDC;
	color: #008800;
	border:1px solid #008800;
}

.pagination_breadcrumb {
	background-color: #f5f5f5;
	border: 1px solid #fff;
	outline: 1px solid #ccc;
	padding: 5px;
	margin-top: 5px;
	font-weight: normal;
}

.pagination_breadcrumb_link {
	vertical-align: middle;
	cursor: pointer;
}
		
		
		
		

Y seria de seguir el tutorial que te paso Leandro M. correctamente.
PD: Guarda tu otro global.css por si las dudas, nada puede salir mal pero mas vale prevenir que lamentar.
Tendrias qe eliminar tu theme y volver a instalar los estilos (GameNow-theme.xml), pero perderias todo lo que modificastes. Antes de modificar algo hubieras echo una copia de la original, noce como hisiste para borrar tantos codigos si el tutorial que te pase era solo agregar un codigo, nada de borrar ni cambiar xD
Es que cuando fui a poner los códigos, no puse avanzado, entonces sin querer pegue los códigos del recuadro y se superpuso a otro :/

Ya puse el nuevo global.css y quedó todo a la perfección!

Muchisimas gracias a todos ustedes.

+1 Rep para todos los que me ayudaron, gracias de verdad.
que es lo que no te deja? pudiste agregar el codigo css en tu global.css en modo avanzado?
Si ya pude todo.

Ya se configuró el foro y pude poner el recuadro.

Muchas gracias a todos.

Si quieren pueden cerrar el tema.

PD: Una cosa tan simple puede llegar a ser muy complicada xD
closed estamos para ayudarte
Smile