I have now completed a GUI to control the 8 Port parallel port relay driver board.
http://www.coolvista.co.uk and click on Pp1 Windows Download
Download the zip file, extract Pp1.exe and the inpout32.dll to same folder, and then simply click Pp1.exe and use "send" to send the signals. Alternatively you can pass arguments to it, and run it from task manager, relays can be renamed on the GUI aslo.