I use FS98.
My computer is Pentium 133Mhz with 1.6G hard drive which 1.02 is available for my english windows (where my FS is). 48MB RAM and some crap graphics card if any at all.
My favourate planes are:
Air Scandinavia A340-8000 (very good panel but climb rate is innaccurate)
CDFAIR B747-400 (Good panel, accurate range and amazing moving parts on the wing)
466 Celeron, 192meg RAM, 10 gig hard drive, with intel chip set. I also have CH Pro flight yoke with rudder pedals (makes for more realistic and controlable flying than just having joy stick with auto-rudder). I have FS2K Pro, and most often fly the default 737-400. Im looking for a 737 NG add on. Any suggestions?