I'm taking my 2.4Ghz SR MBP in for a dead Nvidia 8600GT gpu either today or tomorrow [depends on how much my loong backup process takes to finish]. I had a few questions before I go: 1-I swapped my 200gb HD for a 500gb- no problems w/ install, it's still working great! Should I swap the old one back in before taking it? I'd rather not to save myself the stress of having to open my MBP twice more [swap out and then eventual swap-back-in]. 2-Is there any way Apple can install a different logic board/gpu that isn't an 8600GT? Because it sounds to me like all of these chips are faulty and I just can't afford to fix it or buy a new one when the extended warranty is up, and because this is the only problem I've ever had with it that was serious enough for a trip to the store, I'm doubtful that they'd offer me a replacement unit. After 3 macs, this has been the only one that I've had to take in [my PPC Macmini is 'facilitating' my backup as MBP is in Target disk mode]. Any other suggestions before I take it in for an Apple repair first-timer?