hmm, and what about buttons, the same is true for mouse buttons(on one particular device)?Depends on your definition of "Remap".
If you need it to block the original function (ie make the mouse wheel on one particular device NOT scroll pages etc, in addition to performing the new function), then no, this is currently not possible.
If all you need to do is add another function to the wheel of one mouse, then yes, this is possible.
With UCR I was able to remap (and block the original function) for two main mouse axis X and Y. So, Axis Z (scroll wheell) is somewhat special?