THINGS YOU MAY NEED

XBOX BACKUP CREATOR,

A KREON FLASHED DRIVE,

DUAL LAYER +R MEDIA,

MODIFIED XBOX 360 CONSOLE,

WINRAR,

DUAL LAYER DVD BURNER,

ORIGINAL XBOX TITLES,

AND PLENTY OF HARDRIVE SPACE.

If your burner doesn't automatically set the book type to DVD-ROM for DVD+R DL then you must set the booktype before writing using the appropriate bitsetting app for your burner. Some of the newer Xbox drive firmware’s get past this requirement.
Although like I if you still insist on setting the booktype it will not harm anything.

Recomended DVD burner Pioneer 111D