i take it that i can just copy them onto a usb drive and plug it into an xdk or will i need to edit the files
If you want it to work as in actually launch you'll have to patch the files. You have 2 ways of doing it: 1. First if you just want the container file(original live file) there are programs that can patch it to dev. 2. Other way to do it is extract the files from the container and patch with X360gamehack.
Just use X360gamehack to dev sign the files. You'll need the entire folder with all game files though because in some games more than just the xex is patched.