The message is:
panic(cpu 0 caller 0x0036C4F8): "Unable to find driver for this platform: \"PowerMac3,1\".\n"@/SourceCache/xnu/xnu-1228.0.2/iokit/Kernel/IOPlatformExpert.cpp:1378
Edit:
I also typed in the commands listed above with the same result.
panic(cpu 0 caller 0x0036C4F8): "Unable to find driver for this platform: \"PowerMac3,1\".\n"@/SourceCache/xnu/xnu-1228.0.2/iokit/Kernel/IOPlatformExpert.cpp:1378
Edit:
I also typed in the commands listed above with the same result.