Let me see if I can clarify....

I use Win2K as my main OS booting off of a SCSI HD on ID0.
Second SCSI HD is on ID1.
First DVD/CD-ROM is a SCSI device on ID2 (I want to boot Knoppix from this CD-ROM).
Second CD-RW is a SCSI device on ID3

There are NO ATA-IDE devices in this machine.

I believe I need my first HD at ID0 to boot Win2K, so yes, changing the ID's just to boot Knoppix would be an inconvenience. I chose to play with Knoppix since I thought it would be nice to have a Linux installation that would allow me to keep my system in it's current state. As much as I would like to switch completely to Linux, I require Windoze for most of my development work. I know I could set Linux on a separate partition and use a boot manager, but I've had bad experiences with this in the past. Knoppix seemed like a perfect solution since it boots from CD.

BTW... I am using a brand new Adaptec 39320-R SCSI host adapter (Ultra320). Could it be that Knoppix doesn't support this device?