adding permentally

can you add units permentally as i am thinking of upgrading warcraft to be later in time. so 1 or 2 extra heroes per race, 3 or 4 extra units per race, special units for each race, and also extra buildings. also extra neutrals and neutral buildings and extra mercenary units and heroes.

if you can how to do you do it?

You can add units to the existing tech tree for each race in a map, if that's what you're getting at. If you want to permanently alter your copy of Warcraft 3, I don't recommend it, because you won't be able to play the original game anymore. However, if that's what you're after, you can alter the .mpq to contain data corresponding to the updates that you want to make. That will only change the game on your computer, and any computer who's copy of the game is similarly usurped.