[BirdOPrey5]

If you edit your postbit or postbit_legacy template...

Put your message at the very bottom of the template, and wrap it in this conditional:

<vb:if condition="$post['isfirstshown']">

Your message here

</vb:if>

Then the message will only appear below the first post of every page...

If you want it to show only on the very first post even on a multi-page thread use:

<vb:if condition="$post['postcount'] == 1">

Your message here

</vb:if>