The scenery and the colours in Aerofly FS2 are awesome - so when I realized that the A320 has a "hazey" glass texture that makes everything look "washed out" and pale I decided to fix it. It's 3 simple steps:
1) Rename the a320_glass_color.ttx file in your /aircraft/a320 directory
2) Copy the cockpit_glass_color.ttx file from the /b737 to the /a320
3) Rename cockpit_glass_color.ttx to a320_glass_color.ttx,
...and you're done.
Enjoy the clear colorful views.