transformers : design and development of multi utility vehicle--1

This is my final year project .I am still  working on it
basically it's a robot which can
a) walk like humen
b)move fast on wheels like a car.
This is possible by transforming the robot to car or vice versa in accord with the need.  here I am giving some reference video regarding it step by step......
1) how to make the arm of the robot
   step1>http://www.youtube.com/watch?v=1XAShHGt1nY
   step 2>http://www.youtube.com/watch?v=3hUFfgqD4Xo
  step 3>http://www.youtube.com/watch?v=atovhEMlq_o
the motors as shown in the video ,are of 1.2 kg/cm tor. but we are using double ball baring micromotor of robokits india worth Rs. 525