Wendersnaven.com (a resource for nwn2 builders)

You can set variables on blueprints and objects by clicking on the "..." icon in the "Variables" field under the "Scripts" section of the Properties window. Choose the variable type that you will use (string, integer, etc) and place the value in the appropriate field.

This allows you to set flags that scripts can read. This is how switches work.

There have been some reports that setting a value without setting the type will result in a corrupted module. Hopefully this will be fixed soon, but in the meantime, make doubly sure you set the type when assigning variables.