--- a/engine.h	Fri Feb 10 06:33:56 2006 +0000
+++ b/engine.h	Sat Feb 11 07:34:05 2006 +0000
@@ -40,6 +40,7 @@
 	byte running_cost;
 	byte sfx;
 	byte refittable;
+	byte callbackmask;
 } ShipVehicleInfo;
 
 typedef struct AircraftVehicleInfo {
@@ -52,6 +53,7 @@
 	byte max_speed;
 	byte mail_capacity;
 	uint16 passenger_capacity;
+	byte callbackmask;
 } AircraftVehicleInfo;
 
 typedef struct RoadVehicleInfo {
@@ -62,6 +64,7 @@
 	byte max_speed;
 	byte capacity;
 	byte cargo_type;
+	byte callbackmask;
 } RoadVehicleInfo;
 
 /** Information about a vehicle

--- a/newgrf.c	Fri Feb 10 06:33:56 2006 +0000
+++ b/newgrf.c	Sat Feb 11 07:34:05 2006 +0000
@@ -555,6 +555,13 @@
 				_engine_info[ROAD_ENGINES_INDEX + engine + i].refit_mask = refit_mask;
 			}
 		} break;
+
+		case 0x17: // Callback mask
+			FOR_EACH_OBJECT {
+				rvi[i].callbackmask = grf_load_byte(&buf);
+			}
+			break;
+
 		case 0x1D: { /* Cargo classes allowed */
 			FOR_EACH_OBJECT {
 				cargo_allowed[ROAD_ENGINES_INDEX + engine + i] = grf_load_word(&buf);
@@ -565,7 +572,6 @@
 				cargo_disallowed[ROAD_ENGINES_INDEX + engine + i] = grf_load_word(&buf);
 			}
 		} break;
-		case 0x17:      /* Callback */
 		case 0x18:      /* Tractive effort */
 		case 0x19:      /* Air drag */
 		case 0x1A:      /* Refit cost */
@@ -676,6 +682,13 @@
 				_engine_info[SHIP_ENGINES_INDEX + engine + i].refit_mask = refit_mask;
 			}
 		}	break;
+
+		case 0x12: // Callback mask
+			FOR_EACH_OBJECT {
+				svi[i].callbackmask = grf_load_byte(&buf);
+			}
+			break;
+
 		case 0x18: { /* Cargo classes allowed */
 			FOR_EACH_OBJECT {
 				cargo_allowed[SHIP_ENGINES_INDEX + engine + i] = grf_load_word(&buf);
@@ -686,7 +699,6 @@
 				cargo_disallowed[SHIP_ENGINES_INDEX + engine + i] = grf_load_word(&buf);
 			}
 		} break;
-		case 0x12: /* Callback */
 		case 0x13: /* Refit cost */
 		case 0x14: /* Ocean speed fraction */
 		case 0x15: /* Canal speed fraction */
@@ -799,6 +811,13 @@
 				_engine_info[AIRCRAFT_ENGINES_INDEX + engine + i].refit_mask = refit_mask;
 			}
 		}	break;
+
+		case 0x14: // Callback mask
+			FOR_EACH_OBJECT {
+				avi[i].callbackmask = grf_load_byte(&buf);
+			}
+			break;
+
 		case 0x18: { /* Cargo classes allowed */
 			FOR_EACH_OBJECT {
 				cargo_allowed[AIRCRAFT_ENGINES_INDEX + engine + i] = grf_load_word(&buf);
@@ -809,7 +828,6 @@
 				cargo_disallowed[AIRCRAFT_ENGINES_INDEX + engine + i] = grf_load_word(&buf);
 			}
 		} break;
-		case 0x14: /* Callback */
 		case 0x15: /* Refit cost */
 		case 0x16: /* Retire vehicle early */
 		case 0x17: /* Miscellaneous flags */

--- a/table/engines.h	Fri Feb 10 06:33:56 2006 +0000
+++ b/table/engines.h	Sat Feb 11 07:34:05 2006 +0000
@@ -467,7 +467,7 @@
  * @param g sound effect
  * @param h refittable
  */
-#define SVI(a, b, c, d, e, f, g, h) { a, b, c, d, e, f, g, h }
+#define SVI(a, b, c, d, e, f, g, h) { a, b, c, d, e, f, g, h, 0 }
 const ShipVehicleInfo orig_ship_vehicle_info[NUM_SHIP_ENGINES] = {
 	//   image_index  cargo_type     cargo_amount                 refittable
 	//   |    base_cost |              |    running_cost          |
@@ -499,7 +499,7 @@
  * @param h mail_capacity
  * @param i passenger_capacity
  */
-#define AVI(a, b, c, d, e, f, g, h, i) { a, b, c, d, e, f, g, h, i }
+#define AVI(a, b, c, d, e, f, g, h, i) { a, b, c, d, e, f, g, h, i, 0 }
 #define H 0
 #define P 1
 #define J 3
@@ -566,7 +566,7 @@
  * @param f capacity
  * @param g cargo_type
  */
-#define RVI(a, b, c, d, e, f, g) { a, b, c, d, e, f, g }
+#define RVI(a, b, c, d, e, f, g) { a, b, c, d, e, f, g, 0 }
 const RoadVehicleInfo orig_road_vehicle_info[NUM_ROAD_ENGINES] = {
 	//    image_index       sfx                                 max_speed
 	//    |    base_cost    |                                   |   capacity