Unable to find driver for this platform "power mac 7.3

[barefootdave]

Hi, made the mistake of trashing "system", then disk icon disappeared from desk top.Shut down, then restarted which brought up the grey screen with cryptic "panic" kernal(s). Basically..."Unable to find driver for this platform "Power Mac 7.3"
This is all happening on a PPC g5 dual proc. 10.4.11.
Have two dvds. Safe to say they're homemade. one says ilife 05, the other says osx 10.4 update. No real installation disks on hand.
Can't think of anything else to say other than "Please help" and "Thanks in advance".
OK

 

[BlueRevolution]

Insert the 10.4 disk and start the computer holding the C key. Run an archive & install with "preserve users and network settings" selected. And once the computer is working again, don't touch it if you don't know what it does.