One word of advice - (as someone who deals with The LEGO Group often):
If you ever think you'll take this thing out in public, make CERTAIN that you NEVER make money on it (no coin door) and I would highly suggest that you put a disclaimer somewhere on the cab (back?) that has the usual "LEGO, LEGO Star Wars, etc... are trademarks of The LEGO Group... blah blah blah"
Why? Because I can tell you first hand that LEGO protects their brand with a vengeance! When they get wind of any website or book that has the word "LEGO" in it, they examine it upside down and sideways to make sure you haven't violated their brand in any way. Trust me, they WILL find this cab, but you can make sure to calm them by stating in any forum writeup that the game is for personal/home use only and that the LEGO games you will be playing on it were legally purchased... etc. (Scan the receipts and post 'em if you have them).
Jim
(Author of "LEGO MINDSTORMS NXT-G Programming Guide, LEGO MINDSTORMS NXT: The Mayan Adventure, LEGO MINDSTORMS NXT Idea Book 1 and Book 2, FIRST LEGO League: The Unofficial Guide and creator of TheNXTStep blog where I learned ALL about the LEGO legal world the hard way)