Okay, I figured out how to do it. Not really sure HOW i did it but pretty sure. I was in single player messing around with cheats when I did it.
I started messing around with "thereisnospoon" cheat and acidently bound it to P. So when i pushed P with lightsaber in hand but off, suddenly i was in FPV with no hud but a hand with a lightsaber in it. I dont know if it will work in MP but you can try, BTW i had "helpusobi 1" on.
Hope it works for you