Instruments -
instruments rack - exactly from the main folder is dragged - drag and drop

on this trak can be put more instruments and effects

here in one hour and more it explains how it puts 4 superposed tools and maps the effects to have techno effects
http://www.youtube.com/watch?v=D-QaPGS3P7A

http://www.soundonsound.com/sos/jan07/articles/livetech_0107.htm

ADG file

Ableton Device Group

Contains a group of virtual audio devices that can be loaded by Ableton Live, a music production program; may include software instruments or audio effects; provides an easy way to load multiple devices at one time.

An empty tool is inserted by dragging the main title here and not the presets: