Groups of urls sounds like invocation codes maybe linked to certain keywords or groups of keywords. I am pretty sure I can have one banner area, assigned to one invocation code and have banner A show up on /1stpage.html, banner B on /2ndpage.html, and banner C on /3rdpage.html. I feel there is a certain geeky arrogance in the PAN forum which is why I came here for help.
I´ll google adpeeps. By the way they´ve come up with an even more advanced script on PAN with a completely different name. I´m in awe everytime I see stuff like PAN that open source benefactors develop in their spare time.