Line Follower With Peg Potting Mechanism

[w_bwr]

I 'm working on a robot to compete at NERC Pakistan 2010( A Robotic Competition).

This objective is:
To move in a specified arena, comprising of a non flat terrain with two ramps of specified gradient, and insert wooden pegs into the peg-stands placed at pre-defined points in the arena.

Here is the link:
http://ceme.nust.edu.pk/nerc/floorplan.html

Suggest the Mechnical Design of robot and also suggest the types of motors.