YouTube via AudioDamage001
"This brief tutorial shows how to set up a drum rack to receive MIDI from Tattoo, so that you can use Tattoo's sophisticated grid sequencer and randomization on other sounds. You can also use this method to double or replace individual sounds from Tattoo, while still using the internal sounds. Note that this is only applicable to the VST version, as the AU version doesn't have MIDI out."
Also see:
Using Tattoo's Multiple Outputs In Ableton Live
Making A Simple Glitch Beat With Tattoo and Automaton
http://www.audiodamage.com/