I am trying to connect my PC to my Projector. The PC video card has 2 dvi i connectors for dual display or a HDTV out connector. Using the HDTV connector I can get 1080i. Fine However I would like to output in Computer Resolotion 1024 x 760. I have a 15 meter HDTV cable RGB and purchased two VGA to RGB converter cables. My projector has VGA imput with this arangment I can still only get HDTV outputs is there a work around or do I need to purchase a long VGA cable.