THX for your reply Gigabyte
but in the end i tried with Maximus & Garyopa´s 2.3 / 1.6 more than 20 times. Sometimes i got an "Failed to execute Flasher" and sometimes everything went fine. But hmy friends LW still makes strange sounds when trying to boot his backups and then stops "with unplayable disk" error. But it still boots fine our originals of the same Games (so its not THAT urgent, but I look like a fool to my friend because ive got the same Drive-Model and it works nearly perfect).
My Backups are made with a Pioneer 111d with 1.29 FW on Verbatim silver Matt ones and some on the Printables. Those are working fine in my Hitachi and my sammy.
burnt with 2,4 x
the strange thing is that flashing his drive goes much faster than my one. but it says done at all 10 points and 100 % after finishing.
but the drive still acts like it has never been flashed. I restored his drive a few times till i got no errors and now i dont know what to try next.