I have just finished part of my project with help of this http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1216065789
you cant use it for chacon receivers and transmitters also.
It was a huge help without this topic I wouldn't get anywhere but now I can learn emitted codes from any remote
then send them from Arduino have a look at topic.
I'm also using Arduino to control all windows blinds of my house.