I've had success with this: Convert Install.esd-install.wim Win all download | SourceForge.net
Open source and free aside from the tools used for conversion.

It hadnt worked for me at all.
I had upgraded from 10240 to 1511 and it broke my start menu.
Tried a reinstall with the method above, couldnt get past the "just a moment" screen where it would loop...

THIS IS A WARNING TO ALL THAT WILL DO THE FOLDER REDIRECTION!
It will not work with Version 1511.
The following WILL happen.
You will be stuck on OOBE where it says "Just a moment" then loops back...