Take a look at your computers IP address and you will probably find that its IP address is 192.168.x.x, depending on whose brand of router you have.
Linksys & Cisco tend to go with 192.168.2.x while Belkin goes with 192.168.1.x
If I am right, then the IP address of your printer is not even close to your network and will need to be changed.
When you change it, it would be best if you allocated it an IP address outside of the DHCP range of your router so that it always had the same IP address, even after a power failure.
I suspect that the majority of your problem is the IP address with only a small part of the problem being drivers.
(don't worry after this post i will also try to post to an HP forum!)
i have an old HP LaserJet 5100tn which was shared from another machine, no longer in my network. i have also since i had it on a network upgraded to 10.6.8
now i am trying to hook it up to my machine. i have it hooked up to a router, my machine to the same router. i have an IP address for the printer 18.104.22.168 according to the printer settings, but not much beyond that. i can not see the printer on the network
can anyone direct me to some support documents/links?