You pretty much have to do what Skipeh said, but if you used meshes and particles that didn't come with the game, make your fhm into a '.zip' or '.rar' file, then pack all your object groups into that folder. I usually just put all of mine into the folder, cause' I'm too lazy to sort it out. And get any music you used if you used it into there aswell, I hope this helped x3.