Airshow, I think the end result of decreasing your FS9 resolution would be dis-appointing. I'm quite sure you'll be having "Jaggie" issues. Try this...Take a "paused" pic at your normal resolution, then decrease your rez to 800 x 600 and take the pic again. Resize the higher rez pic to 800 x 600 and compare the results. Let us know what you get will you? I suggest we do a analysis of your other FS9 and vid card settings to try to correct the issue.  Why don't you post your settings and computer specs here and we'll try to help you tweek to perfection. 

Here's a couple of examples of 1280 x 1024 re-sized to 800 x 600 with Irfanview..taken with Nvidea FX 5200 256k, P4 2.8, nothing spectacular as far as equipment,  tweeked to the max though..including an FS9 configuration modification I'll send to you if you like. It really helps with scenery focus, particulary at greater distances.

I agree with BAW. I take shots @1280x1024 and then resize to 800x640. Usually this results in a very sharp image. But you need a good image to start with (e.g. good graphics card to start with, Anti Aliasing and Anisotropic Filering turned up to the max, etc.)

My rule of thumb is that you can hardly ever turn crap into gems, without going into Photoshop ...

Im sorry if its been said above, Im still on vacation and I dont feel like reading all the replies lol

Using a low resolution LOWERS your quality.  While being at 800X600 would give you a 'pure' image, it doesnt allow for quality shots.  The higher resolution has more pixels, and more pixels makes a shot smoother.  The quality difference between a 'pure' 800X600 and a resized larger resolution is not significant at all, in fact the resized larger image will most likely be BETTER than the 'pure' smaller image

Don't forget that in Irfanview there is the option to "SHARPEN" the image...
I often use it in my pics to make them "sharper" and clearer......
....but don't overdo it... ...!

Paul... 8)...!