To get the chords into Cubase:
Save a copy of your real band SEQ song as SGU
Open SGU with band in a box
Open Preferences - Output Chords
Check Output chords
Chord Types - Complex
Ticks before chord change 0
Check Write track to midi file
Save Song As midi
Open midi in real band
Drag export BB Chord Output track
Set tempo in Cubase
Set 2 bar offset in project settings
Drag in BB Chord Output.mid
Insert Chord Track
Select midi track - Project - Chord Track - Make chords
Then just drag all the other midi/wav/wma tracks into Cubase

There in a PNOSIMP style to give held midi chords but they are weird chords Cubase don't recognize.
You can also while you are in real band or band and a box save chord sheet as video that you can open in Cubase.