Oh you just map the buttons to pages that you have already created by using the controls at the bottom of the screen.
If you look at some of the Nektar mappings they use the same technique to flip between tempo synced elements and time based. i.e. if you had a stereo delay that had a switch to set the delay intervals to be ms or bpm related they map one page to show controls as ms, and the other pages as bpm.
Then depending on if the user hits the ms or bpm button the controls update as the page changes, simple but effective.
And yes, i meant faders not filters, doh! 