My 10.4" LCD is blurry in fullscreen mode

I´ve connected a 10.4" 800x600 LCD to use with FSX.
then I noticed there is no support for 800x600 in the settings.
It works fine in window mode when I undock panels from main monitor but when I switch to fullscreen the resolution settings change.

Is there any solution to this or am I stuck with window mode?

You must be stuck with window mode, because i have also face these type of problem and i didnt solve these problem.

I have read something about forcing resolution settings by edit the fsx.cfg file. just replacing 1024x768 with 800x600 but that didnt worked for me.

So I bought a 10.4" lcd screen with 1024 resolution and that worked, but it takes more power (I asume) from the computer to enlarge the pfd screen.

Or you can go back to fs2004 and get a g1000 addon if you want the glasspanel. wich I probobly will, until I upgrade my computer.

Cheers!