[Joe Gardner]

How many ad's do you want to have? You can do it all with if or if else statements. Personaly, I wouldnt visit a forum if there was an ad or tip between every post... What about every 5th post? ie:

<if condition="$post[postcount] == 1">
<-- ADVERTISING CODE --><br>
</if>
<if condition="$post[postcount] == 5">
<-- TIP --><br>
</if>
<if condition="$post[postcount] == 10">
<-- ADVERTISING CODE --><br>
</if>
<if condition="$post[postcount] == 15">
<-- REGISTER! --><br>
</if>

Anyhow, that should give you a good start on what you can do.