I disagree. First place to start, especially if you are running Windows XP is to GET MORE RAM. Regardless of FS9, your computer could really, I repeat, REALLY use that RAM...it needs it!
Agree, But I can't see XP running with only 128mb anyways, see JBaymores post! So he must be running something different, 98?
If it is XP the ram upgrade should be first just becasue with XP the more the marrier, it will improve the system overall. Then you can worry about the graphics card.
At least that is how my experiance was, started with 256mb ram, and a ATI RAGE, installed another 512 ram and the improvements were ten fold.
Then bought a FX 5200 graphics card and now the sim is pretty awesome, and for upgrades less than $100 each!
I like the 5200 (plus I'm saving for a computer I'm going to build) so the next thing is another 512mb ram to boost me to 1gig, we'll see what happens.