IMac G4 Flat Panel Will NOT Mount Leopard Install DVD

I'm trying to install Leopard (MacOS X 10.5) onto a 1 GB 1.25 GHz iMac G4 (flat panel) from an install DVD.
Any ideas why it doesn't mount? After a minute or so and several spins and arm accesses the iMac ejects the DVD. Maybe this is a dual-layer DVD and the old iMac can't read dual layer DVDs?
More important, how can I install Leopard on this old hardware? Can I access the DVD from another Mac set up as a firewire target disk? Can I copy the DVD to a USB/FireWire external hard drive?
Any other ideas?
Thanks.
- nello

From what source is the Leopard DVD? Retail discs should work fine in your model.
You can install from another Mac that is able to boot a Leopard installer by way of Target Disk Mode. See the following: Installing Tiger without a DVD drive and How To - Installing Tiger Using FireWire Target Disk Mode.
You cannot copy the disc to an external FireWire drive, but you can use the Restore option of Disk Utility to "restore" the DVD to a freshly formatted external FireWire drive. Cannot use a USB drive as they are not bootable on most PPC Macs.

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From: san francisco,ca
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I tend to think dashboard is neat, but not neccesary for my everyday workflow.
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http://www.kainjow.com/kermitsoft/downloads.html
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http://discussions.apple.com/message.jspa?messageID=8749558#8749558
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IMac G4 Flat Panel Will NOT Mount Leopard Install DVD

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