Has anyone tested this out yet or have screenshots. I'd love to see it 
Well i added the themes and tryed it out but for me they don't work correctly unfortunately.
I downloaded the hyperspin.nut file and placed it in the appropriate folder.
I created a Hyperspin folder in the layouts folder of attract mode and extracted the themes there.
I tryed a few systems (the name of the system in the emulator settings in your Attract mode has to match the name of the hyperspin theme that you want to use exactly as far as i know) selecting the hyperspin theme but all i get is a black background in front of which i have the selection wheel with the appropriate graffix and thats all.
So for me unfortunately i only get a partial result.