Update README.md

Author: traversaro

library/simulink-library/MomentumVelocityControl/README.md

@@ -9,6 +9,10 @@ Please download Casadi by following this [link](https://web.casadi.org/get/) and
 
 ## How to run 
 
+### From source repo
+
 Add this folder to your matlab path, the momentum velocity control library will be available in the simulink library browser. 
 
+### From installed files
 
+Add the `<install_prefix>/mex/+wbc/simulink` and `<install_prefix>/mex/+wbc/simulink/MomentumVelocityControl` to the matlab path, the momentum velocity control library will be available in the simulink library browser.