I've been more than happy running FS 2002 since it first came out...excellent program...

...!
I also bought FS 2004 when it first came out...

...!
But it sat on my shelf for a few years...!
It's only very recently that I've got the hang of turning everything up to the max, and winding one or two un-necessary things, (like highly detailed weather, water effects, etc.), down to get superb frame rates on FS 2004.
For most computer systems, FS 2002 runs lovely.
FS 2004 really need a lot of fiddlin' with to get decent frame rates, and this often involves turning lots of nice things down/off which spoils the whole object of getting FS 2004...

...!
Having got both I can swop between the two...best of both worlds...

...

...!
Cheers all...!
Paul.
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.