My partner is a Windows guy. I am a Mac guy. He was on site with a customer trying to get a new MacBook Pro (MBP) to print to a shared HP PhotoSmart 7960 which was connected to a WinXP Pro SP2 PC. Should have been a five minute job.
The printer works just fine when directly connected to the PC or to the MBP using the HP drivers. It simply would not work via the shared printer queue. We tried everything! Reviewed all of the online literature, etc. After an hour of this, we finally decided to try the Gutenprint drivers (the new name of Gimp-Print) that come with Leopard. Worked like a charm!
Mac OS X Hints
http://hints.macworld.com/article.php?story=20080325102639290