Model 2 Emulator:
Tab, Emulators, Add Emulator (at the bottom)
Type model2, hit Enter
For Emulator executable: the full path to your emulator.exe
For Command Arguments: [name] (no quotes)
For Rom Path: the full path to your roms
Make sure in the emulator.ini file:
[RomDirs]
Dir1=<path to your roms>
[Renderer]
AutoFull=1 (just above [Input])
That should launch it fullscreen, you'll need a way to Alt-F4 it to exit back to AM. Esc brings it back to window mode.
Have to test demul, haven't set that up..