Help with using a skin

[jcaldwell4]

Hi i'm new and not sure if i'm posting in the right section but

I just downloaded rainmeter and this skin http://kaza-sou.deviantart.com/art/Horizon-Ariadust-Rainmeter-270984147 thing. It says i can use it on itunes and going through the help section I wasn't able to figure out how to use it with my itunes. I extracted the rar file and placed it into the /skins section of rainmeter but it doesn't show up.
wasn't able to find a tutorial on youtube either.

any help on how to use this on itunes, greatly appreciated!