To get the Biab chords into RapidComposer:
In Preferences > OutputCH. (Output Chords)

Attached Files (Click to download or enlarge) (Only available when you are logged in)
BB22-Output-Chords.png (8.18 KB, 116 downloads)
RC-Count-In.png (74.8 KB, 116 downloads)
RC-Import-Chords-BB.gif (203.32 KB, 114 downloads)