Rs232 To 422 Diagram What Is The Best/cheapest Way To Convert IR Signals To RS232 Signals For Controling Electronic Devices?

What is the best/cheapest way to convert IR signals to RS232 signals for controling electronic devices? - rs232 to 422 diagram

I would be able to separate RS232 commands available on my Panasonic PT AE900U projector with a red-programmable remote control access to infrastructure. I have a computer available to convert the IR commands for the RS232 commands, but I'm not sure what is the best tool to achieve this.