Hi guys

I've just installed the brilliant Plastic Theme Pack, but I'm having a bit of difficulty understanding the options.

I've done a few searches, but I'm still unable to understand what exactly the "Scheme" option in the Plastic Theme Setup refers to?

I've tried changing it several times, from "DarkBlack" to one of the others (DarkBlue, DarkRed etc) yet everytime I reboot, nothing seems to have changed.

What exactly does the "scheme" change?
And what steps do I need to follow in order for it to successfully change?

Any advice/help greatly appreciated.

Cheers