do you want to register a car?
Yes
You can register a car in the 'Commercial' class if all the seats behind the driver are removed. Instead of the seats, you must install a permanent box or permanent shelf to transport the load.
I would also like to know how to register collection trucks?
You can register a pickup in the 'Passenger' class if it meets certain conditions, depending on its empty weight
Another question, can I get the registration documents by mail urgently?
You can get your registration documents by express mail, just enclose a pre-paid, pre-addressed express mail package with your application.
if I'm in Canada will it take a day or two longer to arrive?
It will take longer to receive your documents if you are outside of the United States
how do I register a truck I bring in from Mexico?
You would have to read the instructions for how to register an imported vehicle.  I can link you to those instructions.
why did I get a ticket for no NY registration if the cop had no way of knowing if I lived in NY or just passing by?  I did rent in nyc by the way but had only been there 4 months