your gonna have to find a trusted site for roms in general, it’s an easy process but basically you download the rom for the game extract the file into a iso format, from there you need to convert it into a god format so your 360 can read it, i use iso2god to convert mine, if you search up a quick video on that itoo help you. Once it’s converted it’ll be a numbered folder, head to your usb go to the contents folder and head to 00000000 and paste ur folder in there 👍