8 learnable hero skills (Engineering Upgrade test #2)

After learning a lot of things about the engineering upgrade I finally made this map, I managed to find a way to allow 8 learnable hero skills using something like a skill tree menu first, this allows 6 normal skills (3 levels) and 2 ultimates, but using similar stuff you can do up to 20 skills (way too much though).

It uses no spell book / dialog , you just use the normal hero skill menu.

Check it out: http://www.wc3sear.ch/index.php?p=Spells&ID=171

Edit: forgot the link

i was playing around with your first version, and actually understand it... i am going to implement it into a map i am going to make, where you can join a specific guild and once you join, you get the guild abilities...