I built that one myself I'd say the biggest cost was the screen the pc parts I got 2nd hand, so full cost maybe a little over £200 with wires and everything I needed. As for Windows unfortunately unless you get a hybrid version or Linux that works it does really. I had to hack the windows to change it to the knightrider too with windows 7 it doesn't just let you change it like XP did :( I've now changed it all again :) it has the guy from Saw with the laugh it does I will have to record it I guess to show you what I mean :) I'd say the only thing with them is they seem to be an on going project. I'm looking at the satnav side of things with it at the minute plus I want to sort it out, as the PC is in the boot it's just the screen thats fastened in the dash I can remove the PC out the boot easy enough when I want. But I'm going to fasten it all to the back seats in the boot to free up some space :) But I'm also really toying with the idea of selling the car to get a hawkeye. Be a sad day watching her go though but I just couldn't afford to keep it and it's no good sorned :( but thats just early thoughts yet :D