Power Mac G5 (Dual 2Ghz 970MP) running 10.5.8 but crashes trying to install 10.4

Would you be able to help? I just purchased an old Power Mac G5 (late-2005, PowerMac11,2) model A1117 EMC 2023 (Dual 2Ghz, 970MP) that was running OS 10.5.8 but want to install 10.4.6 to run Classic Mode applications under 9.2.1.
The G5 configuration is:
1. Boot ROM - 5.2.7f1
2. 1.5Gb DDR2 SDRAM memory
3. 80Gb Maxtor SATA
Booting off a Mac OS X Tiger (includes Xcode2) install DVD (2Z691-5305-A) (complete with original documentation) that I bought off eBay, the G5 has kernel crash with the following traces at startup:
After this, I reset it by pressing power button, eject the DVD, and I'm back at 10.5.8. I don't have the original install DVD so have tried to use the full retail 10.4.6 (purportedly) version, but haven't gotten that far to verify which version it is.
Thoughts?
Thanks for your ideas in advance.

I only have the GeForce 6600LE PCIe card in Slot 1. No AirPort Extreme/Bluetooth card.
I did replace the old PRAM battery (voltage 2.94) with a new CR 2032 and reset the PRAM holding down Command-Option-P-R keys until second boot tone chimed. (A lot of dust in there, but I haven't really cleaned it yet...) After boot, I reset the date / time.
First, I inserted the OS X 10.4 install DVD, double-clicked on the Installer icon and the G5 rebooted loading from the DVD and then, the same kernel crash as shown on the screen shots above.
Second, I inserted the install DVD, rebooted without holding the alt key and the G5 loaded the DVD and crashed as before.
Third, I inserted the install DVD, did nothing to open the Installer, then closed the DVD. Checked Startup Disk and none of the icons (HD, DVD, Network Startup with "?") was highlighted. I rebooted and I held the alt key at bootup and it presented me with four icons: 1) the hard drive (highlighted), 2) the DVD, 3) a clockwise arrow, and 4) an arrow facing to the right. I selected the DVD with the mouse and clicked on the right arrow. Same crash as before.
I pressed on the eject key, rebooted, took out the DVD, and 10.5.8 booted up as normal.
Thoughts? I have my suspicions about the DVD, but that makes no sense as it appears to be an original with documentation (Welcome to Tiger, Installation Guide, , box, etc.
Thanks.

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