The error DrStealthE experienced I had as well, I initially tried to install BMS after installing Falcon Gold from GOG. When I followed these instructions exactly (installing just Falcon 4.0), the BMS install worked flawlessly.
The error DrStealthE experienced I had as well, I initially tried to install BMS after installing Falcon Gold from GOG. When I followed these instructions exactly (installing just Falcon 4.0), the BMS install worked flawlessly.