roadkill420:
and as I only added 2 links in my last post obviously its the second link as I said but here it is again
It may be obvious to you, but it was not obvious to me.
I have now had a quick look through that PDF but I still have no idea what you want to do with your Arduino.
Maybe what you want to do is common-place for R/C folks and if so you will probably get more useful info on an R/C Forum where people are familiar with the Spektrum equipment.
Otherwise, I can't help feeling that you would probably make progress faster by abandoning the Spektrum equipment and using a pair of nRF24L01+ modules - one in the car and one in a new base unit.
...R