For the 360 you need to have a jtaged system. from what I see it's a bunch of files not just 2 like the ps3. Here is an excert from the nfo. I would say the same as before just use google
Here is the COALSCED.INI related part (even if you see Kratos, this is taken from 360 release):
-----------------------------------------------------------
[Player]
IsOnDiscDLC=kratos
IsOnDiscDLC=kratos_b
;+IsOnDiscDLC=quanchi_b
IsOnDiscDLC=cyberzero
IsOnDiscDLC=scorpion_c
IsOnDiscDLC=subzero_c
IsOnDiscDLC=reptile_c
IsOnDiscDLC=mileena_c
IsOnDiscDLC=kitana_c
IsOnDiscDLC=jade_c
IsOnDiscDLC=mileena_d
IsOnDiscDLC=kitana_d
IsOnDiscDLC=jade_d
IsDLC=kratos
IsDLC=kratos_b
;+IsDLC=quanchi_b
IsDLC=cyberzero
[Player.DownloadContentID]
[Player.DownloadContentUnlocked]
Next, it was trial and error. I located all the CHAR_*****_*.xxx from the assets folder, and could see which character had their DLC costume on disc. ex. CHAR_Jade_D.xxx Most characters have only 2, others have more, that is where i focused.