The fun part is the registration is the window sticker and you don't need to keep any other paperwork as proof of registration (so we didn't). Also, they can't look up registrations because of different computer systems. We had to take pictures of all the registration stickers, email them to the person processing our license applications (while we sat at the desk), then waited for an hour while they called the state Police to verify the plates matched our address and our names.
After all of that, we both received our licenses in the mail with typos on them.
The most humorous part of the whole situation: We lived in Texas before (and both of our previous licenses were still within the expiration dates). But, we were told, because we had obtained licenses in another state we had to do new applications. Our new licenses have the same ID numbers as the previous ones.