I ran that XpostFacto utility on the iMac and now the system crashed. I rebooted it the machine and checked off the option for L2 to L3 cache. The system has now crashed. I still tried putting the Tiger disc and it spit it out. I even put in the OS 9 disc but it didn't even spit it out. Here is the error message I got, please help:

System Failure: cpu=0 code =00000004 (No saveareas)
Latest crash info for cpu 0:
Exception state (sv=0x00000000)
PC = 0x00088330; MSR =0x00003000; DAR=0x00000048; System Failure

Backtrace

backtrace terminated - unaligned frame address: 0x8E008001

Kernel version;
Darwin Kernel Version 7.9.0
Wed Mar 30 20:11:17 pST 2005; root:xnu/xnu-517.12.7.obj~1/RELEASE_PPC