The output of HD over any unencrypted video link is under heavy attack.
Without HDCP on the link, there is no HD output. This and more discussed at http://www.cs.auckland.ac.nz/~pgut001/pubs/vista_cost.html
I have a Dell Latitude D600 with VGA output. I just bought a 37" Olevia 237T HDTV with VGA Input. My Video Card is ATI Mobility/Radeon 9000 AGP 512 MB RAM. Can my laptop upconvert DVD to HD DVD using the VGA cable, and if so how do I do this. Or, do i need to have a specific type of software for it.