Ive always been reluctant to build a new system due to everything I have on my old. my old is a windows XP socket 939 AMD 3800+. I am planning on building a 6400+ AM2 socket. If I were to just take the HDD and put it as the master HDD in the new system (everything new, from mobo/gpus to cd drive and memory and cpu) would it still work? On the driver is Win XP. Thanks!