Those numbers should be on the internet. Apologies if my answers are confusing. I'll try again:
- You can't deploy without a serial number.
- You need a volume license.
- Use the Wizard to customize the installer.
- The Wizard allows you to preserialize the installer.
- Updates don't need to be serialized. Just chain the latest update with the base install as described in the Admin Guide. Alternatively, you can do it later.
As far as adding seats, I don't know the answer. The Admin Guide links to licensing FAQs, but you can also try the Licensing Web Site, support, or your sale's person. You could also try creating another thread with the "add seat" question in the title.
hth,
Ben