Lebesgue: Which system are you using? It is always worth trying running as administrator. Also, there are some weird restrictions on installing program into Program Files folder so if you have the game installed there try installing it somewhere else on your drive.
Final note is that I always get a message from Windows that the programs have not installed correctly even though the mods were installed and work just fine.
Using Windows 10....not installing installing into program files.....I use gog games.....I tried administrator but it still does the same thing....I tried running PST but it was just a tiny window on the left side of my screen. I did some the adjusting that was suggested but to no avail.
