I was really disappointed that my SCSI CD-R drive did not work in Jaguar (6C115) as it did in 10.1.x. I decided to take matters into my own hands and fix the problem. Since Apple's public CVS repository is not up to date with Jaguar, I resorted to disassembly and a hex editor. Anyhow, I have submitted a fix for the problem here. Any feedback is greatly appreciated!
[Editor's note: I haven't tried this package as I don't have a SCSI CD-R!]
Mac OS X Hints
http://hints.macworld.com/article.php?story=20020824215115444