I use Rudeo MCE Control to wirelessly (WiFi or Bluetooth) control my MCE PC interface from another room. I transmit my MCE through a video transmitter to a TV in a room other than the one my MCE PC is in.
This software duplicates all the features of the IR remote that comes with a MCE PC and more.
I have been very happy with it. It is a little pricy but the application is very professional and feel it is worth the money.
They have a trial version you can download to try it for free...
http://www.rudeo.com/mce.htm