I have an Xbox 360 with LiteOn 74850C.
I also have an old Xbox Hitachi dvd drive.
Since I am new to this and didn't want to screw up any original parts, I flashed my old Hitachi drive using Jungleflasher.
Then I dumped the code from the LiteOn using probe3 and spoofed the Hitachi.
I put the Hitachi drive in my 360.
I don't have any copied games yet, but I tried some originals. Old ones, like Fifa 11 or UFC 2010 work well, but newer ones (Halo: Reach, FIFA 12, Forza 4) don't. The thumbnail is shown in the dashboard, but when I click on it, it's like the game is starting to load, but then the screen minimizes and tells me the disc is 'dirty'.
I already tried modifying the POT meters, no luck.