1. A method for adapting operation of a drive unit specifically to an individual user who manipulates output of the drive unit, said drive unit being operable by an operation signal outputted from a control unit when receiving a pre-selected signal including a signal from the user, said method comprising the steps of: (a) providing a computer simulation of the drive unit, said simulation simulating drive unit operation and comprising a drive unit simulation and a control unit simulation programmed to formulate plural control modules, each outputting an operation signal for operating the drive unit when receiving a pre-selected signal including a signal from the user; (b) operating, by the user, the simulation by the steps of: (i) formulating multiple control modules under predetermined rules; (ii) inputting to the multiple control modules a pre-selected signal including a signal from the user to output from each control module an operation signal into the drive unit simulation; (iii) manipulating output of the drive unit simulation by the user; (iv) selecting at least one control module from the multiple control modules, which is adaptive to the user's manipulation pattern; (v) formulating subsequent multiple control modules based on the selected control module(s), if the selected control module is not final; and (vi) repeating steps (ii) through (v) until the drive unit simulation is operated adaptively to the user, wherein a finally selected control module is obtained; (c) saving the finally selected control module in a memory; and (d) operating, by said user, said drive unit using the control module which retrieves the finally selected module from the memory, wherein the drive unit is operated adaptively to the user.