even that doesn't make any sense because the n64 controller is a horrific piece of stuff designed for people with 3 hands. I can't see why you would want to emulate that part of the experience unless you're into BDSM.
Just buy a USB controller. Much simpler, probably cheaper and Waay more compatible if it has 2 sticks.
The N64 games never make you change the handle you're holding, When used with emulators, its basically like an SNES, NES + N64 controller all put in a blender. I can just ignore the middle stick if i want to play the SNES or NES titles.
Besides, it has the loving Nintendo D-pad on it. My gamepad has a floaty ass Xbox 360 piece of stuff on it. It is unresponsive as hell and its an even bigger hell to play N64 games on it since i have to map the C buttons to another thumbstick making the ocarina in Loz:oot the hardest part of the game.
EDIT: Oh an also, try to loving play Goldeneye with a 360 controller. It is hell.