No I didn't mention touch tracks in this thread. This thread AFAIK has been about creating sub mixes for studio work and auditioning in the studio... For live performance, well, touch tracks are the way to go.
I think they are not covered in a TNT yet.
The Logic 8 manual does cover how to setup up touch tracks.
1. Bounce your regions to audio. I recommend bouncing them as loops. e.g. Rather than having a 32 bar audio file, if it's essentially a loop, keep it a convenient size (8 bars) - but this is down to what you need for performance.
2. Import them into the EXS24.
3. In the Arrange create regions for each 'part'. They must trigger the part, so if you want an 8 bar loop, the trigger region should be 8 bars etc.
4. In the Environment create a touch tracks object and cable it to the EXS24 Channel strip.
5. Assign the Touch Track object to a blank track in the Arrange.
6. With the Touch Track window open, drag each region/loop to a different key in the Touch Tracks window.
7. Change the trigger for each of these to 'ToggleLoop' and the Start I usually set to Next 1/1.
8. The transport MUST be running for Touch tracks to work.
9. You can mute the regions (not the track!) and start playback and trigger the touch tracks by pressing a note on your keyboard.
10. Ableton Live is great and really suited for live performance so do consider it.