There are PG Music videos
+++ HERE +++ with more on YouTube by both PG Music and users. The ones on this website are divided into overview, set-up, beginner, intermediate and advanced.
Groove3 has tutorial videos available
+++ HERE +++ . There is a video series for both the Mac and Windows versions of Band-in-a-Box. I highly recommend downloading the videos as you will find them to be both a wonderful primer on how to get started with Band-in-a-Box as well as a useful quick reference later on.
I'm not understanding the topic header concerning Cubase and BiaB. Can you elaborate please.