no worries mate, here's the mail they sent me and i spoke to someone at digidesign and he said the same
"…DSI 5.1 is the first version to support Mac OS 9.1 and the 2001 G4's. You may download this at:
http://www.digidesign.com/download/daedsi.html
-In addition to DSI 5.1, you will also need to download and install, Digidesign Direct I/O 5.1 extension, available at:
http://www.digidesign.com/download/directio.html
-Lastly, you will need to use the Digidesign Direct I/O ASIO Driver. A link to the driver can be found at:
http://www.digidesign.com/download/ptutil.html
-Due to conflicts with Mac OS 9.x, the Digidesign Sound Drivers extension (which provides both input and output via Sound Manager) is not compatible. If installed, remove this from the Extensions folder.
-With Mac OS 9.x, you can still route audio Out of the AMIII via Sound Manager with Mac OS 9.x. Remove the Digi Sound Drivers extension and install the Digidesign Control Panel, available at:
http://www.digidesign.com/download/sndrvr.html
-Whenever you change versions of DSI, be sure to trash the DigiSetup file from the System Folder>Preferences folder, empty the Trash and restart the computer…"
hope this helps u!
