If you use the Install Other Software function, then the mod will install well enough, but when you try to run it through the Program manager, it wont work. The tip to making it work is to start it as a task in taskmanager.
Go to Configure > Manage Bottles
Select the bottle MFH was installed into
Select Control Panel > taskmgr
Select File > New Task
Navigate to main folder of FoF(default is c:/Program Files/Frets on Fire/)
Select Frets on Fire.exe
Select Open.
I'll start trying to get the original and the newest FoFiX mod working.
Till then,
Ja ne,
Inu