A couple of people have done this on here, I have collected all the s/h parts and a wiring harness to retro-fit but have not had the time recently to remove my whole dash to fit yet. Quite a big job but dash comes out as a complete assembly and is detailed quite well in the Bentley Mini manual. You need to like a bit of a challenge..............
Heres more in Link below plus a BMW MINI pdf instructions download for the Air Con retrofit kit.
Retrofitting Auto Air Conditioning Guide - Mini Torque
Some more info here:-
http://www.mini2.com/forum/interior-...rol-panel.html
Post no.2 here has some pics of the dash assy removed and air con/heater assembly:-
http://www.mini2.com/forum/faults-fi...t-working.html 
