This VI package is a meta VI Package. It does not install the actor framework, per se. Instead, it installs the files you need to build your own fork of the actor framework.
This meta package installs into LV 2011 or later.
It installs a copy of the Actor Framework into your "examples\Build Your Own Actor Framework Fork" directory, along with a .vipb file and the pre and post build configuration files. Make your changes in the "ActorFramework" subdirectory, then launch VI Package Manager, point it at the "examples\Build Your Own Actor Framework Fork" directory and ask it to build you a package. The resulting package will be an EXPERIMENTAL fork of AF version 4.3 for vi.lib for 2012 or later (yes, this means that you who develop your edits in LV 2011 won't be able to install them in your own user.lib unless you make your own modified package).
So now, those of you who have a great idea for modifying or extending the AF or who want to build custom debuggers or other tools can now roll up your own package file to share with the community. The package will have the same "package collision" protections that I've used for the MAIN and DEBUG forks, which keep two forks of the Actor Framework from attempting to be installed simultaneously. So you don't have to worry about building these. The package currently does not build any palettes because the AF has its own palette built into LV and I haven't yet put together a post-install tool for modifying that palette -- VIPM normally does not allow packages to modify palettes that are already baked into LabVIEW.
SAFETY TIP: In VI Package Manager, when you build your package, change the name of the package file to something custom so that we know the package is your package and not someone elses!