Basically you want to make the primary or secondary key for "Hotbutton 1" on hotbutton page 1 set to one of your movement keys.
So your next question might come up like "How do I get a 2nd set of hotkeys?", and that involves downloading a different U/I and stuff.
I can point you in the right direction but sure can't explain all of the steps I went through to get 2 pages of hotkeys visible.
Back up your UI folder before you install anything. That part I do remember.