Hi Chris,
Here's the only solution to this problem I could find:
- FSDT's Zurich airport must be installed above "Switzerland Professional X";
- rename LSZH.bgl in Flight Simulator 9\Addon Scenery\CHPRO\CHPRO9_APTS\Scenery folder to LSZH.bgx. I think this file is responsible for that elevation issue. Unfortunately, disabling this file produces a small terrain issue just behind the river, west of the airport but personnaly, I can live with it;
- rename AP950150.BGL to AP950150.BGx. You don't need any AP950150.BGL. It was a bad solution of mine since CHPRO9_APTS\Scenery folder contains the airports data for the region;
- rename LC.bgl in Flight Simulator 9\FSdreamteam\Zurich_terrain\scenery folder to LC.bgx for better blending of LSZH into surrounding landscape.
That's it!
Cheers,
Iouri