Just move it to C:\Windows\Resources\Ease of Access Themes folder and use it.
Of course, You can use this theme file on both 32-bit and 64-bit versions of Windows 8.
Applying the Classic theme will change the Start screen background and tile color to classic view as well.
NEW: theme is compatible with Windows 10 Technical Preview as well!
Thank you so much, This is my favorite theme. Win 10 keeps deleting it though, what should I do? Its in C:\Windows\Resources\Themes, I double clicked on it so I have this theme active now, but Im sure it will disappear again, probably after an update.
I think once Windows 10 reaches its end of life and Microsoft makes Windows just "Windows", they'll slowly start to decline. I could be wrong of course, I probably am, but I think making Windows as a service might not work out that well. I suppose they have to try. I've thought about switching to a chromebook. Couldn't care less about Crapple. I have a good feeling about Android.