Open your inventory (or spells) menu, select any item and hold down the F key (which in your case should be remapped, so you would use the C key instead), this should add a small arrow beside the item.
Tried that. In fact, I tried every key on my keyboard, in case it got remapped to something I didn't assign - nothing works. The only way it works is if I delete/rename the controlmap text file, but since I use the numpad and left-hand mouse, that's not gonna happen.
Then during play at any time in-game you can press the "Q" button to call up your favorites list. If you select any item on your favorites list and hold down a number key (1-9 I believe), it will hotkey that item, spell, shout or power to the button you pressed.
That's the way I know it to work - that's in the manual. I thought they'd streamlined the process like in Oblivion, but I guess not.
