videos of the robot can be found at: http://www.phantasm1.com/videos.html
Take a look to see Ladibug in action.
My first step was to remove all of the plastic coverings and human interface components. like handle bars, seat, foot rests etc. I then had to build a deck or platform to hold all of the computer equipment, motor controllers, and sensors. In this picture you can see the steering has been installed with a large motor scavenged from an electric wheel chair. I added a custom mount for the large diameter sprocket where the handle bars were. then used parts left over from my sons Trampoline to build the roll cage. and support for the decking, also mounted just forward of the steering is the small blue box that is the motor controller built by Roboteq. This controller could handle 24 volts at a max amp rating of 120 for the steering.
Keep in mind that hardware is only part of the robot. without software you have nothing but a topic of discussion. Your robot will never go anywhare. So having a good programer or mentor is very important, never be embarrassed to ask for help. There is a large amount of programs out there that are free and can give you a head start in any remote controlled device. Weather you are fully autonomous or just use a remote to control you robot.