Need to add a link only to first post in specific forum

[JPetrillo]

Hello,

Hopefully someone call tell me how to do this. Here's what I want to accomplish:

For all new threads created in this forum only, I would like to put this code at the bottom left of only the first post of each thread:

<br />
<script type="text/javascript" src="http://www.reddit.com/button.js?t=3"></script>

I basically want that to show up at the end of the post, in the bottom left corner, just before the signature. I want it in the actual post though, not the "left side" as in the part that shows the username and post count, ect. How can I do this?

Any help would be appreciated!

Thanks in advance