I do it the same way as a Gamecube:
D-pad is D-pad, of course
Left analog is the analog stick
Right analog axes are the C-buttons
L1 is Z, R1 is R, L2 is L
Square is B
X is A
Start is Start
It's simple, but for games that use the C-buttons extensively(such as Tony Hawk), it's not perfect. But you shouldn't be playing the N64 version of Tony Hawk anyway
