Question about the ad banner in first post for guests.

[inphoenix]

I am very new to this, so bear with me. When I edit postbit_legacy, I see a bunch of code. Where exactly do I add this new code?

I do see this code in there :

-- <vb:if condition="$post['isfirstshown']">
-- {vb:raw ad_location.ad_showthread_firstpost_start}
-- {vb:raw ad_location.thread_first_post_content}

(I added the -- infront in this post)