Join a game in Gameranger and it'll launch Steam/Battlefront 2. After you set it up, it will appear under my games and will show all the hosted games. So load Gameranger and go to Edit, Options and select BattlefrontII.exe. The modified gamemaster exe must be renamed to something else such as BattlefrontIIa.exe because Gameranger requires you to load the original BattlefrontII.exe. If you accidentally deleted it, I provide one right below. You need your original exe to work with Gameranger. If you did the step above, your exe is modified and will not work with Gameranger. To set up Gameranger, it is an external program so download/install it.