nunogarcia:
If there are receivers that "decript" that frequency, if my thoughts are correct, why aren't there 3-legged IR emitter modules? (I also do not believe I've seen any)
I wish I knew why they didn't exist; would have certainly saved me a lot of time :). You can find "IrDA transceiver" modules that handle all of the 38Khz stuff for you and give you a TX and RX pin.
Be careful when selecting a (3 leg) IR receiver module; some enforce pauses in the data transmission (Sony, RC5, NEC protocol, etc.) as a method of eliminating noise.