Widget Blueprint change to a Different Widget Blueprint

I have a Widget Blueprint (a.k.a Title Screen), and I have another Widget Blueprint (A.k.a Controls) how do I change from one widget to another. Also with the 2 levels of one being apart of my project, how to I package them together.

Well the controls should be part of your character, which should be loaded into the level by default, (you need a pawn after all and by assumption a controller). So I am not sure what you are asking there.

In regards to packaging UE4, take a look at this: Packaging Projects | Unreal Engine Documentation