Everytime I watch my friends play dota I always wonder how they use dagger, BoT, or Guinsoo without clicking the item nor pressing the numberpad. With a little research and hours of googling and garenaing (lol) I found my answer!
Its the inventory A+ a 200kb file size, after you download the file you will see a H logo in the taskbar.

When playing dota just hold the alt+(coresponding letter) to use the key mapping, here’s an example pic I grabbed from www.tmsnetwork.org

To deactivate the key mapping program just right click the H logo and select exit.
-Thx to my cousin, You can view his site aloofkid.com
Filed under: Games | Tagged: dota, dota keymapping, Games, key, mapping