I just wanted to say thank you to everyone for their suggestions, you've all given me alot of things to check into a think about. TO carbonzit, I took a look at page 8 of the manual you gave the link for and that looks very doable.
Another think I was thinking about would be using a microcontroller, but I am not very skilled in writing my own code. I passed the class on it, but still didn't quite understand what I was doing, same goes with c programming. connecting a microcontroller i had no problems with, it was just the coding itself.
The garage door styled circuit is what gave me the idea for sending only one frequency. the transmitter seems simple but i am having trouble finding even sample schematics on that to base my design off of one, same goes for a garage door reciever. With the garage door I realized that only one frequency was being sent out and depending on the state of the garage door it would stop moving, move forward or move in reverse, which is exactly what i'm looking for with the train