Its lovely being a Happy Bunny... [smiley=2vrolijk_08.gif]...!
Once you have completed all the game settings to your satisfaction, they will be stored automatically for every time you re-load the Sim...;)...!
Glad you got it all sorted....
Paul...G-BPLF.... 8-)..!
Tip: Have a peek at the max resolution allowed on your Monitor......
Right click on the Desktop > Properties > Settings....
Try the Max Res settings, and select the same settings in the FS 2004 Sim (Hardware > Resolution Option).
You may get some improved "Visuals"...

...!
Mine is 1280 X 1024 X 32... Desktop and Sim...

...!
Win 8.1 64-bit. DX11. Advent Tower. Intel i7-3770 3.9 GHz 8-core. 8 GB System RAM. AMD Radeon HD 7700 1GB RAM. DVD ROM. 2 Terra Byte SATA Hard Drive. Philips 17" LCD Monitor. Saitek Cyborg X Fly-5 Joystick. ...and a Briggs and Stratton Petrol Lawn Mower.