wake up my PC with my remote, how to do it?

[sanderdvd]

I have the following components and I would like to make it work that I can wake up my HTPC with my remote control.
Can someone please explain, in not too difficult/technical language, what steps I need to walk through in order to make this work? thanks!

my hardware:
Logitech Harmony Remote 525
HTPC with Intel 915GUX motherboard and lastest BIOS version
USB-UIRT device

my software:
Windows XP with SP2
Girder 4
USB-UIRT plugin for Girder
Theatertek DVD software player

thanks again for all help!