See images:
http://img163.imageshack.us/img163/4733/90748629.png
http://img600.imageshack.us/img600/7769/10669282.png
You'll need to set up the functions on some soft keys or on the touch screen. You probably want to use the "physical" softkeys to jump through pages of touchscreens softkeys.
That way you could jump to a maximum of 12 pages of 64 shortcuts at a time. I would imagine that this is more than enough.
By default the bottom row of page one of the touch screen navigates to other pages and on each of those pages you have a home button.