I would appreciate any input towards pit falls / gotchas to installing FSX Acceleration over a well seasoned FSX SP2.It says I have to uninstall SP2, which I hope means I am reverting to SP1, not fully removing FSX. I have backed up my FSX folders that contain fsx.cfg, the scenery cfg, and copied the main folder to another drive.Any input greatly appreciated.Joe

I would appreciate any input towards pit falls / gotchas to installing FSX Acceleration over a well seasoned FSX SP2.It says I have to uninstall SP2, which I hope means I am reverting to SP1, not fully removing FSX. I have backed up my FSX folders that contain fsx.cfg, the scenery cfg, and copied the main folder to another drive.Any input greatly appreciated.Joe

Mine installed exactly as advertised. Uninstall SP2, install acceleration. SDK was at SP2 but it uninstalled completely. That had to be installed from the DVD and then sp1a re-added before I could install the SP1a (same name?) from the Acceleration disk. I had to manually set the locations in the dll.xml but that is the same as I've done several time previously - so no big deal.Loyd

... contain fsx.cfg, the scenery cfg, and copied the main folder to another drive.

If the "main folder" is the one that holds FSX, then my comments won't apply. The primary Terrain.cfg file should be backed up, as the update will overwrite the existing file with a pristine copy. Any add on that modifies the Terrain.Cfg file, such as Orbx, Ultimate Terrain, etc, will see the necessary entries disappear. Some are easy to restore, but having the file saved away before hand can save some time and effort.