You can run RapidComposer in Biab as a vst, it will give you as many chord changes per bar as you like, but I have enough trouble playing 2 chords per bar.
You can load the RealCharts into RapidComposer ,use Sforzando and they will automatically change with the chord changes.
In the pic below they are just held chords.

Attached Files (Click to download or enlarge) (Only available when you are logged in)
RC_Chords_Bar.png (63.81 KB, 65 downloads)