Ok, first have you looked at the room demo that is in the project file install on your hard drive.
Of corse if your are not making a 3d one then this might not help.
However look at the demos, there maybe somthing there that you can mess about with to work out how something's are done like input commands, loading backdrops.
it all takes time I have be doing this since the 80's and still trying and finding new ways to do things.
The main thing is [b]Have fun doing it.
In Space No One can Hear You Scream! (When your comm Line is cut?)