Replying from thread: It's yes and no about that. Everything you download IS tied to your gamer tag but it is also tagged by the Xbox SN it was downloaded on. That's why, sure, you can take your hard drive to a friends and play everything like normal, but you'd have to connect to Xbox Live to "verify" your account basically. I figure it's to stop people from just transferring crap to friends HD's without paying for it, but it can sometimes be a hassle for legitimate customers. hah.