Again, install a game on the xbox as you would have before hacking it.
Download the latest version of NXE2GOD (currently 1.1)
Extract NXE2GOD-v1.1-LIVE.zip to a USB stick and put it in your 360
Using XeXLoader copy NXE2GOD to
Exit XeXMenu via the Guide Button
On the dash, go to Games > Demos and run NXE2GOD
NEX2GOD will scan your HDD and give you the option to turn any installed games it finds, into “GOD’s” Games On Demand games.
Say goodbye to discs :D