KitKat,
Whilst your comment includes a valid point about the Intro probably starting in the middle of a measure, this does not really matter. Once the Intro starts, plays through and the normal Style variation begins, it is just the same as starting a sequence as normal. The fact that the left hand chord changes in the APC track (5) and any control changes (Track 6) made during the sequence, are out of sync with the measure start points, is totally irrelevant. However, it may make subsequent editing a little more difficult

There may be other ways to achieve what Ted wants to do - the way I described it is the way I have done this in the past - with or without using an Intro.