where is the text centralized? if its the XOOPS contents then you may want to look at #centrecolumn #content maybe the .item classes ummmm? would help if knew what was centered and what wasnt..
<img src="<{$xoops_imageurl}>1px.gif" width="160px" height="1px" alt="" />
<param name="movie" value="????/logo.swf">
<{$xoops_imageurl}>/logo.swf