Wise words, i hav'nt try'd this program yet but im assuming the generated bgl just points to the mdl in your aircraft folder rather than recompiling the mdl into your scenery folder which probably would creat copyright issues, even so i can see all sorts of ac turning up in many scenerys and not all ac designers would be happy.
A word of caution
If you are planning on making sceneries to share with other people you MUST get permission from the original model's creator otherwise you will be in breach of copyright. It is only good manners after all to ask before you use!
I wish this program had turn'd up a few years ago, i still have trouble getting my head around traffic tools, although a do like abit of movement around my airfields, so i'll still keep on learning about ai, but this do'es look a fun program but mainly for private use for the time being perhaps.