Can't pal, it's a little media player thing that just has a power connection via the fag lighter socket, nothing to ground unfortunately, plus it's portable as it's the size of a USB HDD (it essentially is but with a DVD player on the PCB).
It's not bad actually, only cost 30 quid, stick in a HDD and off you go, been sat watching Top Gear on the way to work along with something else :D
Seen the place near me has them in for 7 quid so going to give one a go at the weekend :)