The only patch I have installed is the most recent official patch, yet every time I try to run the unofficial patch I get an error saying it''s for the english game only, which i have, and the program closes. Any ideas? I've searched the forum but to no avail. Any help would be appreciated.
The patch works only with the original US/UK release. Note: The GOG version is basically the same data, just pre-cracked, so it works with it as well.
The patch should be working fine on XP/Vista/7. I guess, your game simply doesn't match the original data then. You could try reinstalling the game, in case your files got corrupted somehow, though I doubt it will fix the problem.
You can also install an older version of the UAP. The file checks were added only in the last version.
I had the exact same problem, all i did was get an .exe extractor like universal extractor and simply copied and pasted the files in the arcanum directory