We already got the whole thread about that:
Hosting Server - Start three servers on one host machine | Movie Battles II Community
tl;dr:
There are different ways to archive this; pick one whatever you want:
1. Use openjk:
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2. (jampDed) Open "JediAcademy\GameData\MBII\MBII.pk3" with WinRAR or WinZIP, copy jampgamex86.dll to "JediAcademy\GameData".
3. (jampDed) Create a copy of whole "JediAcademy\GameData\MBII" folder, something like "JediAcademy\GameData\MBII2".
One instance of server should start with "+set fs_game mbii", and another one should use "+set fs_game mbii2".
Anyway, you'll need create second (third, fourth...) config file, also there should be additional shortcuts or .bat files to start servers.
"Target" field of first shortcut have to be like this:
Code:
"G:\Program Files\JediAcademy\GameData\openjkded.x86.exe" +set dedicated 2 +set fs_game mbii +exec jampserver1.cfg +set net_port 666
Second shortcut (in case of method N3 don't forget to modify fs_game parameter):
Code:
"G:\Program Files\JediAcademy\GameData\openjkded.x86.exe" +set dedicated 2 +set fs_game mbii +exec jampserver2.cfg +set net_port 777