How much time do I need to update this cause I have no internet at home. I am just uploading at internet cafes. I will try to update this map this coming friday or saturday. I will also try to add some customs but I don't think the Original WC3 AI will work properly. I will do my best.
If you want to create AI with custom units, you have to first of all go to the Object Editor, go to file and then go to 'Export All Object Data'. Save this in your Warcraft directory and then import into the AI editor.
As for the map itself, it's woeful, but I can see the logic behind creating the races off of the melee ones (by which I mean replacing them). I can see that you wanted there to be AI. One thing I'll never understand, however, is why ppl want to create extra races by using imports. There are enough models ingame to create your custom races from, so in the end imports for those styles of maps just become space fillers, making the map unnecessarily big.
The main risk with finding models that look good is the problem of using them for prettiness' sake. I mean, if you had a projectile system going for a Medieval style map, you don't just think 'Hm, maybe I'll add a Grenade Launcher to show how well I can use this Vectors System I found'. To me, the same applies to models.
And finally, there is not much in originatity. Create something new for your races that will allow them to compete against the melee races! If you create a map with as many races as you can think of while not presenting anything new, you've got Evolution of Races (yes, I went there). When you create just one race, just ONE, think of all the possibilities you can for something that will make it completely different from all the others. Also, using ingame models and nothing but makes for good practice in terms of learning what there is in the World Editor and just how much there is in terms of resources.
I hope to see you attempt a new map, but I don't want to see it posted before it's finished. Too often people post unfinished work in the map section. Anyway, good luck!