In the file Blender2FSX I read for the requirements:
Windows 2000 or later.
FSX Acceleration or SP2 SDK.
Microsoft .NET Framework Version 2.0.
Blender 2.45 or later - download and run the "Installer" build of Blender.
I really the FSX Acceleration or SP2 SDK needed ? Exsist there no converter for the "simple" FSX SP1 ? Or even for FS9 models to convert to a Blender file ?
As FS SP2 gives so many problems... maybe I should wait until a better way is developped or simple start from zero with Blender ? Can I install directly SP2 without SP1a and uninstall it without damage ?
Or can I export from GMAX to Blender ?
The discussion here is interesting but not always easy to understand.