Installation of cruise system in cultus 2002

yaar i am thinking of installing cruise system in my cultus as u all know that city nazim of Karachi is doing great work of roads in khi so now all we have underpas as well as flyover in khi,
all o fthem are signal free corridor( as u all know that i heard in some countries pupil r so much civilized that there r no signals in whole city )& no accidents happen there, all follow rules & responsible
similarly khi nazim going to do same with khi,
in 2011 all karachi will be signal free because it is old japanese saying" that no. of traffic signals in any city shows that how pupil are" more no. of signals means nation & pupil r careless,irresponsible but few signals means they r civilezed

anyway as i am talking of signal free corridor so i have to travel on them daily at almost the same speed for 30 min. or 40 min. & straight mostly
also i have to on super highway/national highway on which i have to drive at constant speed for more than 1 hour or sometimes 2 hours

so i am thinking of installing cruise system in my 2002 cultus( as i dont wanna play with my city, i want to do experiment on cultus) so plaese help me in this .
from where & can i do cruise system in cultus or not
feel free to answer me in detail

on ebay.com i saw cruise switch for corolla 93-99 so i think we can install that( but somebody told me that u can get desi made cruise system & switch from lahore in lesser price, it has just some 2 wires(used even clutch wire) as well as small electronic circuit as well as 3 holes in your carberotor

so what is your advice on it