sorry, it does sound remarkably dud-like...
tell you what, why don't you just assemble an external firewire/usb 2.0 case ($50) and Pioneer 18X burner ($35) because you'll have something that will even burn dual-layer. Plus it will be much, much, much faster than any internal burner. When you burn 4.5 GB at 16x you're talking in the 5-6 minutes versus around 15-20 minutes with a laptop burner. I've got a Combo in my 12" PB, but I always use the external firewire, it's way faster.
Plus you'll be able to take the burner with you to your next laptop, whereas anything you put in the laptop at this point, you're never gonna recover.