I'm trying to reinstall Tiger (10.4.0) on my PowerMac. I insert the (retail) DVD, restart, and hold down "C" to boot from the disc. Shortly after the gong, the "You must restart your computer" message appears, along with several dozen lines of kernel panic text superimposed. The kernel panic text begins "Unresolved Kernel Trap..." I am able to boot into OSX from the hard drive. I've repaired permissions, cleared the PRAM, and tested the install disc on another mac. I've tried to boot and install from an iPod. There are no peripherals attached besides the Apple keyboard and mouse, and no third-party hardware is installed inside. I've gone through the troubleshooting documents at Apple support. Can anyone help me with this problem? The computer is a PowerMac G5 Dual 2.0 GHz PowerPC with 512 MB DDR2 SDRAM.