did you install chameleon to the hdd to boot from there or do you boot from boot123-CD?

If the system (OS X) has come as far as running fine, it should be possible to boot it at least from the hdd, too, if one supplies the right kexts in the correct folder and gives it chameleon. I can't be more precise, since I don't have access to the hardware as of yet.

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MacBook Alu 2,4 GHz, 4GB, Seagate 7200.4 500GB, iPhone 3G 3.0
Shuttle SG33G5, Intel C2Q Q6600 2,4 GHz, 4 GB, Samsung HE753Li (retail Leo 10.5.6), Seagate Sata for Vista, PX-810SA, Nvidia 9600 GT 512MB

SG33G5 runs Retail Leopard 10.5.6 (vanilla) thanks to boot123!