on a somewhat related note, I will be moving with my girlfriend to her apartment, is there a time limit to declare my change of residence?
You must report a change of residence address on your license, permit, non-driver ID, or vehicle registration to the DMV within 10 days.
I'm still unable to complete the registration process because I've forgotten my temporary password. So, what do I do now?
You can use the link shown to clear out your sign-in information from our system to avoid being redirected to the Register for MyDMV Online Services page.  Then you can use the Forgot your Username tool on the NY.gov ID sign-in page to get a list of all of your NY.gov ID usernames.  If you have more than one e-mail address, though, be sure to check all of them.