I recently bought the 250 gb xbox 360 with built in wifi so that I could finally plays games on xbox live. For years I just played games offline with my old xbox 360, but I decided it was time to get live. I made an account and joined xbox live for one month to get a feel for it. However, now I want to use the gamertag that I played offline with for years online. I have achievement points and a custom avatar that i really like and I want that to be my profile on Xbox live. Is it possible to use my old gamertag that i never played online with now and still have my achievements and avatar?