hi all - new here to mp3car and really interested in the Infill G4. but i have a few questions regarding the SD software. If I buy an external hard drive (powered thru the usb), will SD recognize it and allow my music and other media to be stored there as well? also, I'm a big fan of the OBD-II sensor's potential but was wondering how SD implements it. can it only show those simple graphs? what if i wanted virtual gauges like the pics for the international version of the G4 show? what info can the OBD-II reader display? can it reset the check engine light?