Update to RTM Asset Pack 0.5.7

RTM_Objects_pack/SCAssetPacks/PRRPiggyBack/PBLoadID.json

@@ -0,0 +1,14 @@
+{
+    "loads":
+    {
+        "PRR-PBTrailer1": {
+            "description": "PRR-PBTrailer1",
+            "units": "Pounds",
+            "density": 62.4,
+            "unitWeightInPounds": 0.0,
+            "importable": true,
+            "payPerQuantity": 0.0,
+            "costPerUnit": 0.0
+    }
+    }
+}