First, here's a straight rip from the seb_vha.pbo file:
      class UserActions
      {
         class OpenDoors1
         {
            displayName="Open Left Door";
            position="axissidedoorl";
            radius=18100;
            condition="this animationPhase ""sidedoorl"" < 0.5 and player distance this < 5";
            statement="this animate [""sidedoorl"", 1]";
         };
         class CloseDoors1
         {
            displayName="Close Left Door";
            position="axissidedoorl";
            radius=18100;
            condition="this animationPhase ""sidedoorl"" >= 0.5 and player distance this < 5";
            statement="this animate [""sidedoorl"", 0]";
         };
         class OpenDoors2
         {
            displayName="Open Right Door";
            position="axissidedoorr";
            radius=18100;
            condition="this animationPhase ""sidedoorr"" < 0.5 and player distance this < 5";
            statement="this animate [""sidedoorr"", 1]";
         };
         class CloseDoors2
         {
            displayName="Close Right Door";
            position="axissidedoorr";
            radius=18100;
            condition="this animationPhase ""sidedoorr"" >= 0.5 and player distance this < 5";
            statement="this animate [""sidedoorr"", 0]";
         };
         class raisepilotsight
         {
            displayName="Raise Pilot Sight";
            position="axispilotsight";
            radius=18100;
            condition="this animationPhase ""pilotsight"" < 0.5 and player in this";
            statement="this animate [""pilotsight"", 1]";
         };
         class lowerpilotsight
         {
            displayName="Lower Pilot Sight";
            position="axispilotsight";
            radius=18100;
            condition="this animationPhase ""pilotsight"" >= 0.5 and player in this";
            statement="this animate [""pilotsight"", 0]";
         };
      };
These are simple to play. For instance, if you want the right door on a Huey to open, you might have:
choppername animate [""sidedoorr"", 1]
Or maybe it's just:
choppername animate ["sidedoorr", 1]
Well, try this and see if it works ;D.