There is a TON of info for registering a bus, NY specific even, if you dig around here. How are you trying tp inside the bus, private use, RV, commercial, what? Have you looked into your state's laws regarding bus registrations/insurance? I don't live in NY myself, so I can't help you there. However, if you use the search bar here you can get several results.
Another, even better method (opinion only) is to use Google site search feature. In Google search bar type "site:skoolie.net NY insurance" or whatever subject you like. The important part is the site address you wish to search "skoolie.net" and the "site:" before it.
Hope you find the answer! It's been done but I have heard NY is one of the especially complicated states to live in and register/insure for cheap.
-Travis & the DawgBüs
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