I have never used it myself, but I found out that HP includes a trial version (2.0) of this app with its iPAQ hx4700, which is VGA enabled:
http://www.cmcus.com/ipaqhx4700.asp
If Vindigo didn't work well with VGA, I don't think HP would include it. However, if you really want to know, it's best to try the demo. :)