Yeah first of all you'd need something to transfer with like say an xport and then you'd resign the gamesave with your id's and put it on your account however microsoft will console ban you in like less than a second lol.
my buddy does gamesaves for gamerscore all you need is a memorycard one of these You must login or register to view this content. so you can connect memory card up to comp use xploder software or download resigner and regster up on the xploder website and you can start downloading saves ;0