Can't be done without using software that we don't discuss here, as it requires a model change from 5AN/BN to 7AN/BN, not just upgraded firmware. You can physically install a new back chassis, LCD module, and 3.5 housing/keypad, but it won't be functional and you'll only see a fraction of the items on the display. Basically, it'll be a waste of $350+ dollars.
Take my advice, if you do decide to pursue this, find another site to discuss it on.