Yes, I have a black screen problem again, but I found an interesting thing. I have 4 versions of GP4 (one for league, two with original season, one with 2002 season). The black screen problem is only on the GP4 installed from CD with no add-ons. This exe is in registry, others are not, because they are copys.
It looks like, that problem infect only the GP4 which is in registry.