Remapping My "Windows"-looking Button to Home Screen

[Mojary]

hmmm...and you didnt install any cab to map that? because the only button i can re-map without any help of a cab is the call key in the buttons setting.

if youre on a call and if you want to go back to the home screen, you would just close the dialer by pressing the X and it will bring you back to the today screen. pending you didnt have any other windows open when you make/get the call. but if you do have other windows open, you can always just open start menu and tap Today. granted it takes abt 2 moves...but thats the only way i can think of doing this...again, in the absence of the appropriate cab.