Yes you can, and if you're disabled like me, you get to use the red carpet appointment line too. I walk with a cane so standing doesn't do good for me. But even if you aren't and don't have an appointment, you can. If you can, do it during the week about 9AM. I had to get my registration changed from out of state, so mine was a little more complicated than most, but it still went relatively quick. The people at the initial desk, should be making sure that you have all the documents you need.
Yes, walking are ok. Longer wait but doable
Thanks! Your answer is awaiting moderation.