Donation Logo in Postbit - Help

[Lighting90]

Firstly, I am no coder, a million miles from it, so please be kind...

Okay, under our old versions of vB, we use to show a Donate picture in the postbit, so donars were clearly indicated on the forum, without long lists etc....

Now the line we use to have in postbit use to be like this...

<if condition="is_member_of($post,39)">
<a href="/forum/payments.php"><img src="http://www.Mysite.com/forum/images/donate.gif" alt="Contributor" style="border-style:none" /></a>
</if>

Now looking at the new version, the way the code works looks different, so I assume I am right to think the above will no longer work.

So, is there any kind sole who could help me out with this, it would be appreciated.