What should I do?

[Jhon]

@ Cave: Right now the problem isn't that big, I can play with decent FPS disabling the autogen scenery, that's what slows the game down a lot, and I already got used to play without trees/houses, all I care about are the buildings in the airport

Also be sure to kill explorer.exe when playing FSX, this improves performance immensly.  You can open it again by using "New Process".

Never heard that before, gonna try it next time I run FSX. Thanks for the advice