tbgtbg said:
Something else to consider is the warranty. I don't really care about a live ban (I still haven't even signed up for live), but voiding the warranty by cracking the case open has me worried about doing it. I just know my luck will cause it to eventually RROD if I void the warranty.
Just remove the warranty sticker with a hairdryer and a knife, you can put it back on later if you need to send your 360 for service. I recommend saving it on a wax paper.
I've flashed many 360s and I always got those stickers off without damaging them.