Hey I am fairly new to orbiter, I know the basic controls and I can control most of the air crafts in a basic way. And recently I just downloaded the UMMU Add on from Dan's orbiter page and put it in the orbiter directory. When I open orbiter I can see the UMMU Demo folder and it has all the different demo's I can do, like flying the turbo pack. I was wondering how I actually get to have the mmu's in the spacecraft I fly, and to use them in my scenarios.. Im sorry Im such a noob, but I have looked at other manuals and stuff, But I really dont know what I am meant to do. So if someone could please help me, and tell what I have to do, it would be great! Thanks 