Not entirely sure exactly what they use them for, but I'm sure they'll have a list of the various formats the numbers/letters are in (which differ based on which country the disc is from) and match it up against that.
I'd just email them all of what you can read off the back, should satisfy them. Only had to deal with Codies support once, and the problem was solved from the first email, so I can't help you on their exact processes.
As for the patch, don't have an answer on those. I'd expect they won't be saying anything until they are ready to release, because don't want the pressure of a deadline creating more bugs in a patch. They are of course reading the threads here so hopefully the major issues will be addressed, but again, I can't answer that because they don't have an answer for it. I expect it to be months not weeks, but that's just speculation.