let me tell u this... a long time ago on my friends 360 I downloaded Oblivion expansions (vile lair and knights of 9), and I used my 360 hard drive and his 360. well when I got home it didn't work, I called Microsoft and told them after being transfered 3x they told me that my 360's code and his 360's code aren't compatible or some BS they told me to re-download it and long story short nothing! They told me when my 360 got the RROD that all my downloads would have to be re-downloaded because they sent me a replacement, again I got nothing, if I had live running it would work otherwise it won't work.