lw,

I believe you can use the RealTracks for your demos. But it does require mixing in a DAW (your choice) - after exporting the tracks out of BIAB.

You can use pushes to move some chord hits... though you might need to adjust them in your DAW by clipping/cutting/slicing (whatever you want to call it) a chord or section of chords and sliding them where they need to be.

I do this but laying down a separate track myself - playing acoustic guitar, but it could be any recordable instrument - with the syncopation that I want. That gives me a reference. I then match up the RealTrack chords to those of my recorded guitar.

Here is an example of a song where I did that (a bunch).

http://floydjane.com/Songs/Shadow.htm