Hi Peter,
Here's how I do it:
1. Insert Breat Tweaker on a Software Instrument (The Stereo version will do just fine for this)
2. Load up a preset (For example, Electro > AB-Duck Tune)
3. Create a 4-bar MIDI region on the BT track
4. Double-click the MIDI region and draw a C2 note (4-bar long)
5. In BT, solo the track you want to bounce. (Of course, if you want to bounce all 6 tracks you don't need to do this)
6. In the Arrange, Control-click the MIDI region and choose Bounce and Join > Bounce In Place (Or use the key command. By default, it's Control-B)
You're now ready to bounce your part! Repeat if necessary...
Let me know if you have any other questions. :)