Questions: Does it support doing an update and selecting specific things to install

I have two questions here:

1. After doing an install I will release an update version afterwards and I was planning to have an upgrade process going (update/add files instead of doing uninstall first), is there an build-in way to do this or do I need to script the entire process? Are there any example modules or at least "recommended way" for doing this?

2. During installation process I wanted to give an option to a user what to install (eg: Full app or just an agent or both), how does Setup Factory handle that?

Thanks!