Update: Using final big extracted all files from mod. Game runs fine but Tibed dosn't like it (error when trying to expand units or .building trees). Manually replaced UFF Nalpalm strike with cluster mines in science, command button, command set and special weapon .inis. Game crashed at start (technical problems). Replaced with original and it works again. I am sure I did everything right as I based it on the other superweapons imported into UFF from other sides. I don't know whether changing the UFF powerplant from the china one to the American one would be any easier...