How do I get my new assets into UE4 or Unity5?
In UE4, you create a new folder in your project(name it whatever you like). Right click on that folder in your Content Browser. Click Migrate. Migrate your assets over hassle free.
In Unity, go under Assets>ImportPackage>Custom, and find the package we provided. It may take a few minutes depending on the size.
I hate your naming, how can I quickly change this?
There are free tools like BulkRename that are very handy when dealing with an abundance of new assets.
Where are the collisions?
I am afraid to say that in some cases, assets like collisions or even terrains were custom built in Unity and UE4.