I should have known that there would be problems placing FS9 scenery into FSX. But I tried it anyway and got some nasty results.
For one thing I couldn't start the sim because It said my aircraft was in collision with another object and for me to pick another start point. (I tried to install V.C.Bird -TAPA)
So i started at TNCM-Juliana. As I neared V.C.Bird I think I was taking view of the demo's no fly zone because the ocean and the GPS radar displayed a blacked out area just Beyond Antigua.
Anyhow as I made the descent into V.C. Bird the frame rates started going bonkers. I saw the airport was displayed but i couldn't land on it. As I made a wacky landing attempt on final i crashed into an invisible building!
I should have known that all scenery files have flatten zones that all the scenery to exist in certain areas. Those flatten zones eliminate objects from the general area of the addon scenery.
Guess the only way for FS9 scenery to be placed in FSX is for someone to figure out these flatten zones for each scenery file. :( Orelese we will be waiting a very long time for the creators to design scenery especially designed for FSX.