Maping keyboard

Hello, maybe someone can help me in my problem.

I would like to map the keyboard keys, but the software won't let me do it. I have huntsman tournament edition, since the synapse it won't let me.

As an example:
The 2 key will write 2 and the (shilft + 2) key will write @ as the second option.

Here is the problem, I would like to map the keys so that for example my key '' 2 '' writes when combined with shift @ but if I combine it with alt write #. That way it would stay ...
2 = 2
shift + 2 = @
alt + 2 = #

This is an example to be able to configure, because really the keys that I want to map are not those.

On the other hand I have problems to put macros in FN, but I get that research, but if you know of any tutorial it would be fantastic.

Finally, thank you for the help.
and being it for my english