Help - How do i Add/Change Hero ability in Trigger?

Hi all,

I know there's no such Action available. But can any script can help me to do this action? Any expert of making war3 maps or Blizzard officer can help me about this?

Situation: I want ppl can choose ability in game and once he choose the hero ability, the ability will enable for the trigger unit.

Problem: There's no such action to add ability for the trigger unit.

The most similar one is first make the unit got the ability and disable the ability in unit editor, after player choose that ability, enable it again. but one unit only can have 5 hero abilities so this method is useless.

Can any advance script (War3 scrpit command) can let me do this? Please help me. =)

- fol2

Well, I've been throwing around ways to do this, and I thinnk the best way to give the hero all the abilities they could possibly have, disable them all, make custom units with the spell icons, let hero gain level, when they do they go to building and click to train custom unit that has that spell icon, then detect custom unit made, enable skill and use learn skill trigger, remove custom unit (so it never appears to appear).