adding neutral-hostile abilities as learned abilites?

I'm not sure if this can be done, but I'm going to ask anyway just in case I miss something here in the forums. After carefulling reading through all the abilitiy threads here, I wasn't able to find an answer to what I'm looking for. So, what I need to know is if there is a way to make an ability from neutral-hostile into a hero ability where you can level it up. For example, I'm trying to reintroduce the Warlord hero that was taken out of the orc tech (the "orc chieftan" as he is now called), and I want to add the neutral hostile ability "Command Aura" into one of his slots, where he can upgrade as he gains more levels. Wasn't this "Command Aura" originally for the Warlord anyway? I read elsewhere here in the forums that one of the many orc spells is "Command Aura". It was never used and instead given to a neutral-hostile unit.

Now, I've read about modifying the mpq files and the slk files, and so far even that didn't tell me anything about giving a hero such an ability. What's more is that I also read that it cannot be done since neutral-hostile abilites are already researched and there is no way to modify that. But, isn't there a way where you can perhaps copy another ability, change its effect and replace it with say the command aura? iow use one aura, change it around, and make it into another aura.

Another thing that I need to know is what are the exact programs I need to download in order to edit the mpq and slk files? As you can tell by now, I'm new with the editing with such programs. However, I'm pretty well knowledgeable in the trigger editor. Any help is very much appreciated!