How to implement a UI Kit into a website?

I have a psd version of a UI Kit that I would like to implement into the forms, etc, on my website. It's similar to the one below - which is "Chutzpah" by Morgan Allan Knutson (@rnorgan)...I'd show mine, but I don't have a screenshot. This will demonstrate the same concept, though.

image from http://designmoo.com/2435/chutzpah-user-interface-kit/, where you can download his kit.

What tools do I need to utilize to do this? Can I do it simply with CSS, or do I need to use some client side scripting? Or, is this something that is really just for mobile applications?