Been ages since Ive used 9 regularly so my memory is fading, but from what I remember the display and other hardware drivers are installed as extensions and load at startup that way. If I had one of my 5500's still bootable then I would just boot it up and tell you which ones you need, based on what mine has installed, as I dare say the drivers supplied with 9.1 should still load on 9.2.2... hopefully. Maybe somebody else with a 5500 running 9.1 could have a look. You need I beleive the Ethernet CSII extension to have the network card supported, and there are various extensions that support the ATI Rage II chipset. This link may give you somewhere to start as far goes looking for these...

http://www.astro.wisc.edu/~haffner/MQP-RAVE.html