habitual line stepper
Join Date: Apr 2002
Years Riding: X
How you found us: .
I think the only feature they have is to recover a profile. Take a look at that functionality. If your current online account is empty, and you don't mind replacing it with your offline account. The Recover Gamer Tag I think, might allow you to do that.
Otherwise, I don't believe there is a way to take saved game info from one profile and move it to another--that would make cheating way too easy.
FWIW the easiest way to move data from one x-box to the other, including your profile, is to buy a memory unit. It's a small dongle that plugs into the front of the xbox. In order to move your saved game info from your nephew's machine, you would first have to move it from the hard drive on his to the dongle.
I keep my profile information on a memory unit. Then I can log into live on any xbox--I have a couple. When you use a memory unit games will ask you at startup whether you want to store saved game data on the local xbox hard drive or the memory unit. The memory unit is limited in size, so you can't expect to save all game data there. I usually save data on the hard drive, but in the xbox system control panel you can go into storage area and move data explicitly from the hard drive to the memory unit.