The Bootstrapper you link to is a type that is part of the
Prism[
^] framework, it has nothing to do with creating a Setup. Prism is a guide and framework you can use to create WPF applications.
What you're look for is this
Walkthrough: Creating a Custom Bootstrapper to Show a Privacy Prompt[
^] never used it myself, but I see no mention of a "bootstrapper tab" on any of the pages I've visited, and you will need to create a seperate project, as far as I can see, which also makes sense. So I suggest you read the walkthrough I linked to.