visual flight london

By stagger do you mean it's shimmering (like heat waves) it acts like a slide show, stuttering.

Hit shift+Z two or three times and tell us what your FPS reading is.

You are in a graphic intensive area and your video card can't handle it so the FPS goes down and looks bad. Just a guess.

it says locked at 41 fps
and i have turned off all the special fx and traffic
gfx is radeon 9800pro 256mb

It's locked at 41 but what are you getting. If you are getting under 25 at the airport that's why the problem.

How much ram do you have, the more you have the faster the textures render.

at the airport it is 41
when i fly or approach the area of scenery it reads frames/sec= 08.1
i have 1gb ram

Since it's under 25-27 your getting stutters because the video card can't handle all the scenery.
You can turn down the scenery slider but then it won't look like what you paid for.

I sacrifice FPS and get stuttering so the scenery looks good, and when I leave the area the FPS goes back up.

Your choice.

Turn down your clouds and turn off shadows and see if that helps.

does it not state on thier website that you need VFR scenery installed prior to installing Visual Flight London?

I may be wrong im not sure?