For an AMD/ATi chipset (well, this worked for my SB600 anyway) you can extract the VIA-SB package from the LawlessPPC distro (from /System/Installation or /System/Library/Installation, I forget which - the System folder is hidden and you'll need an OS X box with a working DVD drive anyway) and install that and reboot.

What I did was I stuck the LawlessPPC DVD in my Macbook, hit Shift+Cmd+G to open the Go To Folder dialog, and typed /Volumes/(name of DVD)/System and then browsed, dragged the pkg to a thumb drive, plugged the thumb drive into my AMD machine, installed, and rebooted. Voila! See the second post fo this thread: http://www.infinitemac.com/f5/asus-m...install-t2630/

This will not help you Intel chipset guys, who need JMicron drivers, most likely.