new mac user HELP!!

I just got my ibook and it rocks. It joined my windows network with no problems the only thing that i can't get it to do is i can't get it to print to my shared printer on my windows machine. I can go to add a printer and it sees the printer on the right computer, but when it tells me to pick a driver it is not in the hp list so i installed the software the printer came with and it still is not in the list so i am lost on how to get this working. please help.