RF link with attiny device

Hi,guys I have these rf transmitter and receiver : http://www.robotev.com/product_info.php?cPath=1_30&products_id=235 http://www.robotev.com/product_info.php?cPath=1_30&products_id=236

I wan't to use two separated attiny microcontrolers to send and receive numeric data. My first question is how can I achieve this,and what attiny microcontroller to use ? Note: I have arduino UNO and I can program any microcontroller with the ISP MODE. What I actually want to do is to recognize when the user is around a table and do something.

Have a read of this , will help you get started. http://www.open.com.au/mikem/arduino/VirtualWire.pdf

No suit me,because virtualWire need faster timer0 which attiny85 don't have :D But this guy somehow managed to do it : http://www.youtube.com/watch?v=Zl51yAu9VEo