ok, first set your new hdd to primary master, and the oldie to primary slave. (use the jumpers on the hdd's)
Then partition the new harddrive into whateva amounts of space u want, and delete the old partitions on the old hdd. If u dont want to lose whatevers on there, back it up first. Then, once u done all that...u can re-name the hard drives to whatever u want (C:, D: whateva)
nehuz...