If you can find the driver for your chipset, you can use Transmac in windows to insert the driver in to your Install DVD in the /System/Library/Extensions/ folder; the only drawback is that once you install it this way, it only places it in the Install DVD and not to the Installer portion so the DVD can boot but the newly installed OS cannot. You then need to reboot into the Install DVD and insert the file into your /System/Library/Extensions/ folder on the OS drive and you're home free.

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