In my high school we have a projector installed right in front of the booth and shoots about 70' or so. (Some projectors have an option of a long throw
lens and can shoot up 150' or so) When our installed projector broke (no money to replace it yet) we thought about hanging a smaller classroom sized projector from our catwalks but haven't in hopes of finding money to replace our previous one. Depending on the angle you may be able to hang it from the catwalks. I personally do not like the idea of mounting it on a
batten because if there is an air current going, it could start swaying and the picture would move around. Although if there is no other way, (and me and my supervisor thought about it) then that could be the only way.