Good information here.  Thanks!

What if you create a video file that lasts just a couple of secs with black screen, and import into the project? Put it before the original video file. That should give you some time for the notes you want before the original video starts.. If you can`t import two separate videos in the same project, maybe you can glue them together in "windows movie maker" first..?

AFAIK you can only import one video into SONAR, but the above idea of a lead-in would work.