Moon Patrol Graphical Improvements in Mind

[Moon Patrol Graphical Improvements in Mind]

This isn't the final design. In fact, I just made it by memory, in one sitting. So don't expect much thought was put into it.

[Moon Patrol Graphical Improvements in Mind]

So, looking at Moon Patrol, you can see that the buggy is extremely chunky, in its 2 color pm quad pixel glory! But, I would like to bump up the resolution of the buggy. So, I've been making this mock-up image in gimp, where the wheels are made out of software sprites, at the cost of changing a color register that was a dark brown. Big deal. The body is the only part of the buggy that's a hardware PM (and the windshield to prevent color clash in other areas). So, is this doable?