Re: 360/NBA 2k8 Question...
If you mod your 360 you better be ready to pay an extra $300 once your XBox dies.
And it's not if it dies, it's when.
The 360 is unreliable as they come and I would expect most 360s to not have a very high life span.
However, I would expect that it's probably your 360 acting up again. Check your MFD Date. You probably got a refurb'd 360 from MS, which is terrible and that's why you need to buy the warranty in-store.