I see this as a two (*independent*) part problem.

#1) A way to use OpenID as a way for people to authenticate comments without needing an account. Since I don't want anyone to have the ability to create content (aside from the comments), it's silly for me to make an account for each of my readers ...

If you're hip with databases, you could simply change the ID of your categories so it matches what you want. But, keep in mind, you'd need to start at a different number than "1".

For instance, if you've got 5 categories and you want them ordered "d e b a c", what I would do is change the category ...