i can also help you shummyr!
got 2 games to work with the bd image generator. the only thing you need is the debug pkg's eboot.bin. edit it to dev_hdd0 and you are good. but the only games that work are heavy rain and killzone 2, others load but stop with a black screen and no error message.
when you build the image, you will get error messages, don't worry that's normal.
you can also format your hdd directly with the bd image generator app. its very easy to handle, and you can build up to 4 images on 1 hdd. you have to set the game you want and it shows up in the xmb as blu-ray disc!
very good app, but it would be great if we don't need the debug pkg. without it i can't start the games.