Here are the parameters the starter passes to the server (command-line argument):

0 : il2server.exe
1 : -GS
2 : -name
3 :
4 : -room
5 : FBMC_Test
6 : -port
7 : 21000
8 : -maxclients
9 : 8
10 : -lobbyaddr
11 : 216.98.52.31
12 : -lobbyport
13 : 41006
14 : -groupid
15 : -1

With that parameters you can launch the il2server.exe directly.
I tried to set the -lobbyaddr/-lobbypot to fake-IPs/ports, but then a MessageBox popped up, telling me, that the registration failed --- end of story