Hi, I just bought a used laptop that has XP pro installed with COA sticker on the laptop. Unfortunately, the HD is fried so I need to replace it and re-install XP pro. Since I have a COA on the laptop, I can just get a XP pro OEM version w/o COA. But do I have to know which XP pro version the laptop came with originally? Or can I just get whatever XP pro version I can find, whether it is with SP2 or without SP2, and it will work fine with my COA? Thanks!