I was wondering if any one knew of a way to run diagnostic software on an in dash head unit. For instance maybe you could run hp tuners diagnostic on one of pioneers nice in-dash touchscreen head units. Some come with hard drives and have usb connection. I know I could easily do this with say a laptop in between the two, but I wanna go straight from Pcm to head unit. Does any one know if this is possible? Maybe another company make software for this? If not I think this would be a badass set up.