A: A first offense DWI with no aggravating factors may be able to be reduced to a DWAI violation, but it will depend on the BAC. The Westchester DA's office is very specific about how they handle different BAC readings. You should hire an attorney, so that can try to get the paperwork from the court, and find out the specifics. My office is located in White Plains, and has represented hundreds of people charged with DWI around Westchester County.
A: Operating without headlights on at night might be grounds to pull someone over, but that alone isn't the basis for an arrest. There would need to be evidence of impairment or intoxication to give an officer probable cause for arrest on a DUI charge.
A: The court that has jurisdiction to hear a criminal case is the court in the county/city/town that the alleged crime occurred in. So if the crime occurred in Puerto Rico, it could not be transferred to somewhere outside Puerto Rico.