I'm running G4 AGP 466 on OS X 10.1.1 with following mods:
- added RAM to 640MB
- added Western Digital 100GB Caviar drive (slave, original 30GB is master)
- replaced original CD with Yamaha CRW2200EZ ATA CD-RW (20/10/40) (master just like the replaced original was)
Everything was fine...