Using Instant Scenery, I would like to create two scenery versions of the same airport in FS9 and FSX. First, I'd like to keep my stock or default airport as is with just a few modifications. For the second version, I'd like to create a full blown airshow scenery package. Is it possible to have two versions of the same airport loaded in FS9 or FSX?Thanks!

The stock airports in FS9 and FSX may be different. I assume you would use something like AFX to create the modifications to those since it can compile to both versions of the sim.As far as objects are concerned it really depends on the object libraries that you use. If you create your scenery in FS9 using libraries for FS9 and then transfer the bgl file, libraries and textures to FSX you will find out if the FS9 objects will work in FSX. It is quite probable that some will not work. You would then have to remove them from the FSX version and replace them with something that does work - preferably from a FSX object library.