XP Pro network printing

I have a NT server SP6 with a TrendNet 3 port print server. This print server has worked great with Windows 98 clients. We just ordered several clients with XP Pro. Got them on the network and email runs fine but it hangs the print server. I downloaded the newest HP DeskJet 960 drivers for XP–but where does it get installed? In the Sharing tab, XP is not listed. I opened the printer window on the NT server and updated the driver–now no systems will print. How can I get some Windows 98 clientsand some Windows XP Pro clients to work on one print server?