Default Settings

H (Keyboard): Speak to all in your team(Positional)
* (NumPad): Speak as SquadLeader to all SquadLeaders
/ (NumPad): Speak to your Commander
0 (NumPad): Speak to your Squad (Positional)
1 (NumPad): Speak to SquadLeader Alpha
2 (NumPad): Speak to SquadLeader Bravo
3 (NumPad): Speak to SquadLeader Charlie
4 (NumPad): Speak to SquadLeader Delta
5 (NumPad): Speak to SquadLeader Echo
6 (NumPad): Speak to SquadLeader Foxtrott
7 (NumPad): Speak to SquadLeader Hotel
8 (NumPad): Speak to SquadLeader India
9 (NumPad): Speak to SquadLeader Juliet

Setup

Stop FH2
Start FH2-Mumble setup as Administrator.
Install FH2-Mumble.
Start FH2-Mumble with the desktop icon as Administrator.
You will be switched to the according channel once you join the game.
Start FH2 with the desktop icon as Administrator.
Have fun.

Info

You can also add the FH2Mumble Server with this IP+Port 217.79.190.136:64762