[CodingMonkey]

Doesn't sound too hard..
So basically it's donating money to other users with a paypal entered in their user profile field?
Seems it would be something like this ...

<if condition="$post[fieldX] 
                      && $post[userid] != $bbuserinfo[userid] 
                      && $show['member']">
<a href="$paypal_addr_with_email"><img 
      src="/path/to/beer.gif" border="0" alt='Buy me a beer through PayPal' 
      /></a>
</if>

That's the main code right there.. just have to have a profile field for it.