You have to use a hacking program. If Microsoft sees it, which they can, they'll permanently ban your system. If you play alot of online games, it's easier to detect but if you don't, you should be fine. They'll definitely see it if you have to send your system in for repairs. Just looking out.
http://forums.xbox-scene.com/index.php?showforum=166 Start researching before you make the move. Some people are running 1TB HD on their Xbox 360. It isn't that hard I just thought you should know of the possible consequences before hand.
Usually the HDDHackr has only been working with a few Samsung and Toshiba drives. It works primarily with Western Digital. Edit: Looks like the HDDHackr only works with WD drives..

Xplorer360 should work with your drive I just don't know if the HDDHackr will.