vB4 - AD in second post - How to?

Hi

For the old vB3.8. I made a modification to show ADs as a second post.
But I have to admit that CSS is not my strong side.

I know there is a hook for the this Ad position.

But I want it to look like a post and not splap a banner between 1st and 2nd post.

Like it is on my forum right now: Demo

Did anyone do this and doesn't mind to share?
Anyone willing to help?

Thanks in Advance

StarBuG

Ad after first post, DigitalPoint forum style - How?

Thanks,

I'll ask for a solution in this thread then.