With difficulty, unless they have that many in the app store!
@lyndaloo67 yes you can add 50 apps. They really do have that many in the Now Apps store. I have 55 showing on mine (I just tested to see how many I would end up with though that did include the Now App, Sky Store and some trial apps.
A lot of them are crap though
Well yes that is true, but as the old saying goes one person's muck is another's brass