Procyon

My brother and I bought all the halo 4 series 2 figures of mcfarlane and used the codes to unlock the skins in my account. My brother's account, in the same console, can also use the skins. The problem is that I have to change the account region from Chile to U.S.A.. Will I still be able to download them from the download history? or use them at all? (Are they compatible with the halo 4 included in the Xone master chief collection?) How can I make a backup of these skins? I see that there are just some "Halo 4 game unlocks" and "Halo 4 game unlocks 2" files, but I don't know if these are the files.