Mouse2Joystick Custom CEMU v0.2.0.3 is released. An AutoHotkey Script to allow the use of Mouse and Keyboard control in CEMU. This uses vJoy and provides several additional features over regular keyboard control, like: the ability to control the camera with the mouse, toggle walking speed, in BotW use MouseWheel to change weapons, a separate Toggle key for ZL useful for locking onto a target.

Mouse2Joystick Custom CEMU v0.2.0.3 Changelog:
Added ability to customize the Mouse check frequency
My thought for this would be it would help for some people who feel there is a delay when moving or stopping the mouse.
Added ability to assign more than one key to the same vJoy Button
This can only be done by manually changing the KeyList string
It is accomplished by appending extra keys with the | symbol
XButton1|e in the list would set Mouse4 and e to the same vJoy button

Download: Mouse2Joystick Custom CEMU v0.2.0.3
Source: Here