Motorola V551 settings question

I just bought an unlocked Motorola V551 which had been previously locked to
Rogers Wireless. Since the WAP and internet settings are still set to the
Rogers defaults, I need to change them so the phone's features work with
Fido. According to the manual, there seem to be menu options on the phone
which aren't available on the model that I have, like the one that would
normally be used to change WAP and internet settings.

Is there a way of activating these disabled menu options? What about
downloading and installing an unbranded flex image or firmware image and
installing that onto the phone?