This is a theme for CyanogenMod 10.x, using the T-Mobile theme engine. If you are not running CyanogenMod 10.x (or a similar ROM utilizing the T-Mobile theme engine), it will not work for you.
Basically, this theme alters the softmenu buttons to be blue, with the home icon being replaced with Cid’s head (CM’s mascot). If your device has physical buttons and doesn’t use the softmenu on-screen buttons (I’m looking at you, Samsung users), this is utterly pointless as you’ll never see the theme.
It makes no other changes, and themes no other parts. I will probably release additional themes that do more, as time permits and creativity inspires.