Not yet, I am currently traveling in Japan so I won't get time to look into it until I get back to France at the end of May.

There is no easy tutorial to do this unfortunately, I did it by hand. Are there new revisions of the fusion emulator that I am not aware of?

I could attempt to patch them if you send me the builds.

xbox.xex is the binary that checks the title id of the xbox game and compares it to an built in table to run a specific xefu emulator build, it also performs the whitelisting. The Xbox360 kernel itself (or was it xam.xex?) has specific ingame restrictions based on the xefu title id as well.

I extracted the main exe binary from the xex files after applying the xexp delta patches and threw them on IDA, found what functions I wanted to patch, applied it to the decompressed and decrypted xex and resigned it with xextool.