.htaccess redirects will take care of this easily...
Code:
RewriteEngine on
Options +FollowSymlinks
RewriteRule ^go/modelsite/ http://refer.ccbill.com/cgi-bin/............. [R=301,NC]
and just add more rewriterule lines for the domain you want to redirect URLs on!
So in the example above, if my domain was "redirect.com" the URL would be
http://www.redirect.com/go/modelsite/
and it would automatically direct the surfer to
http://refer.ccbill.com/cgi-bin/..........
and of course, CCBILL would redirect after setting the cookie to the site - looks seemless to the surfer.
Enjoy.