If you get either this
FMS USB interface or this
Ripmax interface they'll allow a standard Tx to be used as if it were a PC joystick and this lets you control FMS or Microsoft Flight Sim (or ANY software that accepts a joystick) using your radio transmitter. I know for a fact that they also work with Cockpit Master Backyard Edition, Aerofly and Piccofly amongst many others.
This way you can easily fly FS2002 using your Tx. (though personally I prefer the "real" R/C sims, especially FMS).
Cliff