Hello CG. I will offer my suggestions.
Fly the 190D, always start with a full fuel load.
Its best climb speed is 170 indicated.
After you have reached 8000 feet, fly it around at 300MPH at all times. Its faster than most aircraft, so you can really dominate at that speed. Pull short 'instantaneous' turns of no more than 45 degrees and blast away with all guns.
If you are on someones tail, you have HEAPS of ammo, so keep blasting away. You wont run out.
Turnfighting:
From 0 feet to 5000 feet, it has hundreds more horsepower than most other aircraft, that means if you keep the nose upwards and downwards and use your fast roll rate, you can actually dogfight spitfires and La's !!!!
Defense:
Run away. It can fly at 550 MPH without losing control. Dont cut your throttle in the dive. Just go fast until the plane nearly shakes apart. If someone is close on your tail, just use your ailerons to change directions. Most other aircraft cant roll as well about 450MPH as the Dora.
The 190D has similar acceleration to a spitfire mk8 up to 305 MPH. If you can get above 305 MPH in level flight ,the 190D keeps accelating up to about 340, which leaves most other aircraft including the Spit 8 behind.
Watch this and enjoy.

Shortened slow motion clip (silent) 15 meg:
http://www.mediafire.com/?2hjzgmyvmmyFull length, 60 frame per second clip 33meg:
http://www.mediafire.com/?ndyhbmdy4j2Video Codec
Download the divx codec here:
http://www.divx.com/