Changing macbook keyboard language

Hi all

Having moved to Europe I recently had my Macbook's keyboard changed to the french keyboard layout.

I have changed the keyboard language in the System Preferences/International/Input Menu panel which is fine once I am logged in.

However before I log in the keyboard is still set up as a US layout, which means I have to type my password as if I was still using a US keyboard.

My question is: How can I change the systemwide keyboard language setting?

Any help would be much appreciated!