(a white file when extracted?)
What do you mean with "white file" ? The zip file contains a file named trees.dds, you can't see it unless you have a proper viewer for .dds files.
I pasted it in the JFK folder...building still flash.
This because it shouldn't be pasted into the jfk folder but, as the previous message says, in the fsdreamteam\jfk\TEXTURE folder.