So I don't know if this was an oversight or not but since the xProcess file is just the entire project folder you can't easily import it into an existing project. It's not a huge deal since you can just open the project, export it as a local package and then import it into your project but I would have felt bad if i didn't mention this.

Import-able packages are now included alongside the *.yyp projects in the updated zips, for everything, except Virtual Visit Maker, (as that project is more of a GML demo, and not an extension at all) ...

Let me know if you need anything else! :)