Anybody help !! All of a sudden!! My G4 Mac running OSX 10.3.9 wont recognise either the OX re-install disks or my Techtool pro 4 disk. but it can't be the drive as it will recognise and mount any data disks ,all audio disks and prg disks . Any suggestions would be great co's i'm stuffed !! Robb U.K.