Since I didn't really see a question there, I have some for you...
1. You say the "boot" which I infer as the "trunk" -- will have the save video output as the front screen?
2. What features do you envision controlling with the remote?
3. Do you need a remote? Why not use the bluetooth keyboard/mouse?
4. What software are you planning on using?
5. How far away do you envision being from the TV in the boot (when your sitting around watching it)
Oh, wait there was a question...
No, the M2 doesn't have the additional 4 pin power supply (I have an old one and don't remember having it). That said a molex to 4-pin connector are out there (http://www.gttkc.com/shop/index.php?...roducts_id=638 , quick google search) -- and the M2 should provide enough power.