Thanks for the quick reply, Rob.
We do not have cPanel, but use wsFTP_Pro regularly. I do have a copy of the files needed for the site on my hard drive, so that part of the migration should be pretty easy. Also, we do not use databases, so that's a non-issue.
Since it can take up to 72 hours, I guess I'd prolly do the migration Friday evening and hope for the best. Do I notify NSI or do you guys take care of that?