SSSLex

I'd like to install a mac mini in a GS300 but am stumped by one thing, how to handle the VGA output. Does anyone know of a product that will allow video input (eg vga converted to svideo etc) onto the stock touch panel? Alternatively if that is not possible i am planning to mount a 7" touch screen for the mac. The obvious place seems to be the top of the dash but this eats into visibility. Anyone have any other ideas on where/how the 2nd screen could be mounted?