Landtrain!!!!

README.md

@@ -1,3 +1,30 @@
 # Landtrain
 
-Yargh I be a land pirate, or g'day chap wanna vb with that land train
+Landtrain extends Towbars to support chained towing.
+
+## Important
+
+Project Zomboid base `BaseVehicle.addPointConstraint()` force-breaks existing constraints.
+To keep `1 -> 2` while attaching `2 -> 3`, Landtrain includes a Java class override:
+
+- `zombie/vehicles/BaseVehicle.class`
+
+This is the same override pattern used by mods like Realistic Car Physics (manual `zombie` folder copy).
+
+## Apply patch to game
+
+1. Run:
+
+```powershell
+.\tools\patch-game-basevehicle.ps1
+```
+
+2. Ensure both mods are enabled:
+   - `hrsys_towbars`
+   - `hrsys_landtrain`
+
+## Restore vanilla class
+
+```powershell
+.\tools\restore-game-basevehicle.ps1
+```