[DPSR]

Try this-

In postbit search:

PHP Code:

<!-- message --> 


after add:

PHP Code:

<span style="float: right;"><if condition="(($post[postcount]==1) or ($post[islastshown] and !$GLOBALS['vbulletin']->GPC['ajax']))">
===YOUR AD CODE===
</if></span> 


Above code will display adverts in first post and in last post






If you want advert in 1st post only, try this:

PHP Code:

<span style="float: right;"><if condition="(($post[postcount]==1) and !$GLOBALS['vbulletin']->GPC['ajax'])">
===YOUR AD CODE===
</if></span> 


Demo: http://img239.imageshack.us/img239/8869/sssl0.gif

Enjoy