My Xbox will only read -r discs. Doesn't like +r even those bitset to DVD-Rom.
Use Craxtion or someother program to convert the files FTPed from the Xbox to the XIso file mode. You will need other files such as Gdfimage, XDFSextract and may also need XDImaker if these programs are not included in your Xiso maker program.
I then burn the Xiso file with Nero and they all play like the real thing.