All 3.55 compatible games now discless on DEX
I've been asked a few times so thought I'd let everyone know, by using the DEX firmware BD Emulator option you can load a game onto a usb drive with ps3gen and use it the same as a retail disc then switch to BD Emulator mode and load whatever backup in multiman even discless games like Call of Duty: Black Ops. If you have any problems let me know.
Instructions: Make a ps3gen compatible partition on an external, it doesn't matter what game it is, I used a 4gb thumb drive formatted on the ps3(because ps3gen would make 4 1gb partitions instaed of 1 4gb one) and loaded SAW just because it's so small, then go to Debug settings and enable BD Emulator and chang Transfer Rate to HDD Native so the ps3 see's it as a retail disc then load whatever backup you want in multiman and it should let you run the game "discless". Let me know how it goes.