[Cooker] Anyone know of a good XFree86 3.3.6 ->4.x upgrade "howto"?

[Ryan Little]

I've got all the rpm's (I hope) for 4.0.3 installed, yet I still come up in
X running 3.3.6....Anyone know of a good "upgrading" how-to?
FYI my vid hardware on this box is SiS 5597/5598 with 4MB mem (Shared system
mem)
I've also got an old 8MB Monster 3DFX pass through board with 8MB mem.
(Banshee 1 even!)
Thanks
Ryan