Install GPU2 - make sure you know the path to the Work folder.
Right click the window, clock Add new client.
Add a name for the client
Browse to the Top folder where the Work folder is situated - not the actual Work folder.
It may take a few percentages until Fahmon recongnizes the Client.
You can add as many as you wish, even over a network (just like I did).
That works for me; I'm using Fahmon, with Vista Ultimate 32bit.