Register Now. Registration at NMSU is a process that includes Academic advising with a faculty or staff member Registering for classes, online or with your .If you have attended NMSU any time in the past three semesters you are Registration dates are determined by your current classification at the time of registration. program through University Student Records Office on the first day of class..After advising, you will be coached on how to register for classes online using your my.nmsu.edu account. Simply follow the process screen by screen. It s easy..