gamba2 appears to be down ATM, so I can't find the filename for the User Manual or Quick Start guide, but maybe the Service Manual will help you get started?

quadra_900.950.ws_95.pdf

Ditto beachy's RAM suggestion, but keep an eye out for SCSI II cards to better the stock 950's 4.4 MBps max.

ATTO's SiliconExpress Fast/Narrow card might help, dunno the specs.

The FWB JackHammer Fast/Wide card woud definitely speed things up and let you use the the little 2.5" Savvio server HDD's capabilities to the fullest extent of the 950's NuBus interface.

That's the best I can do until I get some coffee into the system.