Thanks for your reply!
I tried it but I couldnt etxract any files

I'm still able to extract the ISO from the 2nd session (618 MB)
although Isobuster says "PVD error" too.
In the header i can see the text of IP.BIN.
The problem is: It wasnt me who burnt the game I got the CDR
from my friend so maybe he burnt it at a speed of 8x or 12x.
I dont have the original CDI file, the CDI I tried to patch was created by me from his CDR.
Now I think the game was wrongly burnt...... or is it the copy protection?
Sorry I'm a totally newbie. Normally I'm interested in legal stuff only
But now I want to use a real Backup of course I own the original game