I was assuming you have the IR543 console table remote control with infrared eye, you will need one of those also (about $40) here is a link
[Link: smarthome.com]

Don't know about your Sony remote (does it have x10 in the ROM?) but you need to teach it the X10 IR codes for the IR543 which you can download for compatible remotes or buy a cheap X10 remote to teach yours with.