Mexico City Travel Forum

WE ARE TWO USA CITIZENS WITH FM2 IMMAGRADO MEXICAN DOCUMENTS AND ONE MEXICAN CITIZEN WITH USA VISA WHO PLANNING ON DRIVING FROM MEXICO CITY TO LAREDO, TEXAS. WE WILL BE DRIVING A MEXICAN REGISTERED CAR. MY QUESTION: DOES ANYONE KNOW THE TRAVEL DOCUMENTS AND CAR DOCUMENTS THAT WE NEED FOR CROSSING INTO THE USA AND THEN RETURNING TO MEXICO AFTER A COUPLE OF WEEKS. BY AIR THE FM2´S ARE USED AND WE ARE GIVEN PAPERS AT THE MEXICAN AIRPORT WHICH ARE USED TO LEAVE AND RETURN. THE MEXICAN CITIZEN USES HIS MEXICAN PASSPORT AND USA VISA TO LEAVE AND RETURN. (1) IS THE SAME ROUTINE FOLLOWED WHEN TRAVELING BY LAND? (2) WHAT ABOUT CUSTOM REGULATIONS WHEN TRAVELING BY LAND AS I HAVE HEARD THEY ARE DIFFERENT FROM AIR TRAVELERS.
(3) THE CAR HAS MEXICAN INSURANCE BUT WHAT USA REQUIREMENTS CONCERNING AUTO INSURANCE.