Hi paul, you can import the tempo map from the plugin into Reaper by using the "Chords to MIDI" feature. It allows you to drag a MIDI track containing a tempo map and all the chords in your song as chord labels into Reaper. This can be achieved by dragging from the [C7] button located above the chord sheet in the BB Plugin. You can also choose what will be included in the MIDI file by right-clicking on the [C7] button and selecting between "Chord Label", "Chord Label & Click Track", or "Chord Label & Block Chord".

Regarding your second question, I would suggest creating a post in the main Band-in-a-Box forum so that you receive an accurate response for that particular inquery.