after comparing the two versions (the US being the more recent one, including the ability to remap keys, choosing arcade and adventure difficulty levels etc.) I compiled an archive, which includes all changed files (except for two movies (credits and intro) because of the size).
so all of you, who purchased the gog-version or the original UK release, can now enjoy the best version of the game (sound is fully working, unlike the other existing patch http://shadowcat.freehosting.net/roth_patch.html).
https://www.rapidshare.com/files/126085 ... s_files.7z