Is it possible to give a Hero more than 5 Hero abilities?

Via trigger that is.
The normal Hero has 5 ability slots, right? 3 normal abilities, 1 ulti, and an extra usually assigned as the Stat ability.

Is it possible to add more using triggers or is it hardcoded or something? Thanks.

I do belive its impossible to give a hero more than 5 hero abilitys. You could always trigger hero abilitys via a spell book and ability point tracking.

Maybe you could use engineering upgrade to switch normal abilities to hero ability? No idea how well that would work.

Only 5 hero abilities at any given time can exist on a hero and be "learnable" via that little hero menu. Engineering upgrade on normal abilities won't make them learnable.

Thanks for clearing it up.
I had an idea to have a skill only learnable at a certain level, and we get an option of a few skills. After choosing one, the rest goes away.
But I don't want it to look different than normal skill learning.

I guess that's not possible, eh :D

Temporarily disable the "Learn Hero Skills" ability and add a new one based off of a spellbook that you can simulate the regular menu with?

I might look into that idea :) I'm not a JASS programmer so it may be a little difficult to achieve something that requires knowledge of it hehehe..

Not really, you just have to know the rawcode of the "Learn Hero Skills" ability, which I don't.

The rest you can do in GUI.