I've just done a backup of amped using wxripper.
It went like this :
1. Load Wxripper
2. Find a DVD over 7.5 GB ( I used 24 series 2, DVD 1 (Just shy of 8 Gig)
3. Press find magic number.
4. Press stop drive.
5 Paper clip the eject mech (some drives will automatically think you are ejecting with the button, so it wont work with all drives - Ive got an NEC 2500A - worked a treat)
6. Change the disk over to your original 360 title - in this example, Amped 3.
7. Click spin disk, once the PC has detected the disk is inserted.
8. Dump the contents to your HDD.
I found i got CRC errors on step 3 and 4. So i saved the layout to a file, and opening it with notepad. Changed the first letter of the first 3 lines to a D (for Dummy), saved the file, opened the layout in wxripper, and then dumped with no errors at all.
9. Then I injected the ss.bin file, and burned the whole lot back to a Datasafe DVD+R DL.
Ive got Hitachi LG drive 47d, flashed with Maximus 2.2, and the game booted straight away first time, with no delays at all.
Hope this helps clear up the sequence for wxripper. I only just did it ten minutes ago, and it definately works in the order above.
Hope this helps,