[dartho]

Badger - You can just re-install this addon from the product-mobdetect37.xml product file (the main one in the first post) and that will overwrite the other version.

As for your other questions:
1. No, however you could use the 'custom user agent' section to have a specific style for Blackberrys
2. No - with this add-on, the user doesn't get a choice. I see from your last post that you tried the 'allow change' version - no joy? Did you enable a way to change styles (with the mobile skin addon options)
3. No - AdminCP doesn't use the temaple system which makes it a lot more difficult to "mobilise" it. As such if you view your admincp when on an iphonoe, it will give you the full admincp.