Original thread done by flashallthetime Here
I suggest you use this if you have a recovery.
I was originally going to have him post this in his thread, but I think it should be in it's own thread in case there is issues related directly to this method of installing.
Normally this is installed using AromaInstaller. Basically I just quickly looked and broke it down to a installer that would work for the Moto X. You must be booted into WPLess mode. If you are not sure what this is, I suggest you check out the root thread.
Download the attachment below. This will only install the black theme beats audio sorry if you want the white you will have to replace the _black.apk with the white one and rename it to _black.apk or change the script to install the _white one.
It's pretty simple, if your not rooted or you are in wp mode, it wont attempt to install it will just give you a message stating that you are not in correct mode.
Pretty simple all you have to do is run the Install.bat to install and if you wish to remove run the Remover.bat