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No, it needs to be a DVD - you can use most DVD drives from PCs in the G4 if it's still got the stock CD-only drive, it doesn't need to be a Mac-specific one. You can strip down the Leopard DVD to fit onto a single-layer DVD if you don't have any dual-layer discs.

It'd be a bit of a waste to turn it into an aquarium, those dual processors are fantastic! :p
 
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