If it ain't broke...DON'T FIX IT.
If you had great performance in FS200x using Win98 (or whatever you were using), then why oh WHY go to XP if performance takes a dive?
XP might be pretty, but I'll take Win 98SE ANY DAY for a stable, non-performance-killing OS.
And...I can make my 98 LOOK like XP anyways.
Billy Gates has us (you) right where he wants you..caught in a never-ending upgrade loop. I jumped off the "latest & greatest new version of Windows" merry-go-round a couple years ago. 98 does it well for me.