Thats fine, most all of the touchscreen available are VGA, and they also have a USB connection which sends the "touchscreen" data. So aslong as your compaq has a USB connection (i.e. was made after 1994) than you're probably fine.what to use as an input device (im buying a 7 inch touch panel display but this computer doesnt have any video out except the vga port)
This can be done in many different ways with just the O/S itself, but look into the FRONT ENDS forum under Software.and how to to get it to boot and start the mp3 software automagically. i would greatly epreciate help, TIA.
And ofcourse, read this:
New to CarPCs? Don't know where to start?
It will answer most all questions you have about getting this set up.
Good luck and Enjoy!