How to carry a query string in wordpress post.

[hashbury]

Beaver Bob Thanks for your help so far. Im still having problems. In my feeds-rss file I found the two bits of code

<link><?php the_permalink_rss() ?></link>

<link><?php bloginfo_rss('url') . ?></link>

Is this the right code? Ive tried adding my code like this

<link><?php the_permalink_rss() . $_GET ['aff_link_id']; ?></link>

<link><?php bloginfo_rss('url') . $_GET ['aff_link_id']; ?></link>

I editted the code every way i could think of to get it to work.
So I thought i would go to feed.php and add my string to the the_permalink_rss function. This worked half ass, it will display my aff_link_id= but it will not display the actual affiliate number. I was going to try and use session variables to carry the affiliate number, but i cant seem to get it to work. Any suggestions?