I made this modification and thanks to lePec I also find the last missing wiring diagram. I created a DIY in Romanian and I can translate it to English if needed, but can't translate it in French (sorry).
http://www.peugeotclubromania.ro/forum/threads/35013-DIY-Modificare-AC-de-la-manual-la-automat-(climatronic)
Let me know if I can provide further help.