Update file README.md

README.md

@@ -16,6 +16,10 @@ Just download our latest release: <https://github.com/UFrameIT/UFrameIT/releases
 
 ## Installation (for developers)
 
+**New developpers install guide**: [Snippets - UFrameIT, archives & MMT install guide](https://gl.kwarc.info/FrameIT/UFrameIT/-/snippets/219)
+
+**Old guide:**
+
 First, you have to set up a development environment:
 
 1. Install [Unity](https://unity3d.com/de/get-unity/download) 2020.3.x (LTS) via the Unity Hub.