Hi Eddie,
Can you please explain what you are looking for in more detail? To me, A-B editing refers to the old way that Premiere worked many years ago, for instance version 6.5. You would have video tracks A and B, with the Transition track sandwiched in between. So, your clips had to alternate tracks in order to have transitions, but that complicated edits since removing or adding a clip in the middle would mess things up in regards to the alternating layout. Other issues as well...
Once I got used to the new single-track editing, it is MUCH easier to work with and far more productive in many ways.
Thanks
Jeff Pulera
Safe Harbor Computers