XF 1.2 center logo and put background repeat left and right to it

[localhost8080]

Hello,

I just centered my logo and now I need to put some repeating background left and right to it.

At my old forum, I had a table with three colums:

column left was

<td style="width:auto;background-image: url(images/left.png);background-repeat:repeat-x;background-position:right top;">&nbsp;</td>

center colums was the logo and the right colums was

<td style="width:auto;background-image: url(images/right.png);background-repeat:repeat-x;">&nbsp;</td>

someone can help me please, how to get this done on xenforo?

thank you!

David