The configuration file used in the UI framework specifies the number of buttons in the sliding menu XControl, however changing the value did not change the number of buttons. This feature was not implemented. Below there are two videos with a suggestion on how to implement this feature and the implemented code is attached (Sliding Menu-2011-09-04.zip).
How to add the "Number of Menu Buttons" and "Space Between Buttons" properties to the Sliding Menu XControl:
How to implement the newly created properties into the Facade.vi and how to test them: