ok
now i’ve tried it with the firmware which you’ve linked too:
first i just tried it with dvrflash but i got a strange error (not seen before)
second i tried with your tool (without the fix mode selected) and it worked just fine. Thank you very much.
50x, ok thank you, good to know… (i’m not even close but…) 
just for information the following questions:
1)is “fix mode” the same as “FORCE option” and as the “-vf” parameter instead of the “-v” parameter and what does this option exactly do?
2) What is now my bitsetting with DVD+R, DVD+RW and DVD+R DL, and how come that if I want to look at that with “Nero CD-DVD Speed”, everything has n/a? Is this normal? Do i have to use another prog to view and change these settings? Is it even possible to change these settings with the firmware i have now installed (NIL) and if so, for which formats (DVD+R, DVD+RW and DVD+R DL) ? If possible, is there a maximum amount of times you can change these settings?
3)the “read me” of NIL’s firmware says: “Not patched:Bitsetting (” Come back to your senses and Burn on -R media instead, people!!!")"
Does this mean: also no bitsetting for +R DL (because original pioneer firmware had bitsetting for +R DL), or does it mean: no bitsetting for only +R?
Why is bitsetting for +R not good and do we have to use -R instead?