okay after a long delay i am trying to build my cash back site..

I am having a problem adding this to the URL for my links

Here is my current URL

URL= http://www.anrdoezrs.net/click-XXXXXX-10310121

When a user is logged in (all users must be logged in to use the site) i need to add this to the URL

?SID=ShopperID_Value

in which the shopper ID is the username of the logged in user.

I still need the links to go through the jump.cgi because i am using the frame redirect

Does anyone know how to do this? or where should i begin?
Jason Bishop