I am having an almost identical problem. Here is my config:
G3 Beige upgraded to 466 ZIF
Generic USB Card
ATA 10GB Drive on ATA 0 (Master)
ATA 6GB (OEM) on ATA 1 (Master)
OEM CD-ROM (IDE)
YAMAHA CDRW (SCSI)
I put in the OS X CD and click the install button. A window...