Thank you very much for the suggestions.
I tried the parameters you gave, but the /l# just seems to change the language (for 2-5 I get the error message "***.lng" not found and on 1 (seems to be english) the same error as above described occurs).
As well as the other parameter: /d# simply does nothing, at least it doesnt change the error.
Sadly there are no error logs or something similar in the BCMG Folder.
Well, I had another idea ... I remember reading something about an incompatible VIA Chipset ... and as far as I know the Voodoo 3 uses one, too. Could this be doing any problems and is it possible to patch this?
If this still doesnt work, I'll just buy a newer graphics card ... just to show that it won't change the error