the "real problem" is now: I found the proper update for version 2.0 (normal, direct3d and 3dfx update) but unluckily the existing nocd patch does not work with them anymore. I suppose ppl never bothered of patching it and they always used real cdrom or a cd image instead.
note: the 3dfx update for voodoo2 support works like a charm with glide wrappers. Playing this game in hires with AA/AF is a cool experience.
If you are interested, the game update is here:
http://www.sendspace.com/file/44k5qf
simply unpack the archive in the installdir and overwrite existing files. (for security, make a backup of originals)