ANY sim can help.

You can hook up an old style analog single stick joysticke (think Pong of the late 1970's to early 80's) and use the keyboard for throttle and rudder. Then use ANY flying program that lets you watch your airplane from a fixed ground location. It will help with some parts of R/C flying.

MS Flight sim is pretty good from Tower view. The older 1998 version is still sold as "Classic" and is cheap.

FMS is pretty good. Graphics are not as good as the Real Flight, but its a very good simulator. There is a doc file that comes with it (free download) that tells how to MAKE the transmitter interface cable. Or you can go to e-bay and pay about $15 to get FMS on a CD with the cable made by someone who knows how to solder.

RipMax's flight sim is not as good as FMS in some areas... better in others. It has an interesting set of beginners training challenges that are difficult to complete for even an experienced RC pilot. (you know you are doing well when yu can complete all of them in one try, in one sitting.) It also shows hw much yo damaged the model when you crash. (you'll play with seeing how large a debris field you can make for a while... I spread parts all over the runway once.)

Real Flight Lite is pretty much the same as G2 with limited aircraft selections and no aircraft modification menues. You can't load aircraft into it, design your own or even change the color scheme of the models the sim has. Its still a very useful training sim... just limited selections compared to G2.

G2 is about the best, but you have to PAY for it. The most expensive sim... the most realistic aircraft physics

Maybe the Microsoft FS would be better than G2 if you had the new version and tweaked the aircraft profiles to represent the models better... Tweaking profiles for FS 98 helps a LOT!

BTW... the FMS interface (or the RipMax interface) WORKS with MS FS 98 (and any other game program you want to use them for...) RealFlight's interface and controller will not work for other programs.