how does one go about making a 6 wheel config drivetrain?

[EricVicenti]

There are many different elements required for a 6 wheel drivetrain, so to get a better idea where you are coming from, could you describe the type of drivetrain you are used to?

Essentially, the basic concept behind a 6 wheel drive is that the middle wheels are lowered, so you are only driving on 4 wheels at a time, which will reduce scrubbing immensely while turning. If your robot is balanced well, the front and back wheels will lift off the ground while turning, and only your middle wheels will be in contact with the ground.