Open CD0 file in Editpad - the CD0 mountlist file can be found in DEVS:DosDrivers/ drawer
The unit number will either be in the CD0 mountlist as unit=1 or alternatively it will be in the CD0 tooltypes - if this is the case, click once on the CD0 icon, then goto the Icons menu and select Information. The tooltypes will be displayed and can be changed.
