I was reading a guide to replacing the HD in Apple's mid-2008 gen MBP's, and noticed that replacing it by myself would the warranty and that Apple store tech's have to do it. I'm cheap, illustrated well by me buying a refurb MBP for $1350 after waiting for a couple years to pounce on one. Being cheap, I was thinking of purchasing a 320gb HD for the MBP for like $65 off Newegg, and having the Apple store pop it in for me so my 1-year warranty will remain intact. Does the Apple store charge for this service if they are installing an HD I am bringing in? If I purchase an upgrade HD from the Apple store themselves, will they provide the service free or at a discount?