Different Climatronic ECU'S

Hello,
I've a '91 Audi V8 3.6 vith 5-speed manual gerabox.
My car has an the older climate system.
This is a phot of my car:
http://www.audiclassiche.net/html/amici/audi-v8/plancia.JPG
My question is: it is possible to fit the newer climate control like the one fitted on the 4.2? The cables and the plugs are the same? It is necessary to modify whole the system or not?
Can I "plug and play" the newer climate control?

This is a photo af the newer climate control:
http://www.audiv8.com/german/gallery/drivers/hkh_v8_cockpit.jpg

Thank you very much.
Nicola