I erased the hard drive of my iMac G4. Old install disks are gone. Got install disks for 10.2 Jaguar. Want to install and sell computer. Cannot get the new software to install. Have tried C key, D key, Option key, and just about every other key but get only gray screen with flashing globe, gray screen with flashing question mark, or gray screen with two arrows. Not sure what I did when I erased the hard drive but messed something up. Any suggestions on how to get the 10.2 Jaguar installed? Holding C key while disk is in at start up does not work. Thanks.