Thanks Craig!
I'm basing this on my understanding of your previous posts, so I can't be 100% sure. But, if you're using the same database for the old and new installation, the cmsb_ prefixed tables are likely from the old installation. I can't really make the call if you're safe to delete those tables without investigating myself.
If you do decide to delete them, you should ensure you make a full backup of the database before making any modifications and perhaps test by deleting a single table first (perhaps the error log) then confirming that change hasn't had any impact on the new installation. Also, I'd recommend confirming that none of your other sites is using this database and they could be the source of the cmsb_ prefixed tables as well.
You should also make sure that all of your front end pages are connected to the new CMS and any pages that perform CRUD functions on records are being made in the new tables.
Cheers,
Greg
Greg Thomas
PHP Programmer - interactivetools.com