CSS CSS walkthrough anyone?

Hello,
Just wanted to say that the templates on the site are very nice and well done. They are an excellent way to kick start ideas for new designs and content especially for those who are not gifted the way the developers here are.

The biggest obstacle (for me anyway) is to understand how to break the template down and edit the content of the CSS. It seems that CSS is becoming the method of choice for creating pages and it seems that it is very efficient at changing content fairly quickly, it's just getting a head start on how to go about it.

I am using Go Live 5 that does have some CSS capabilities but it is really not helping me see how things need to be edited.
I also am using Photoshop 6 which is helpful to edit the PSD files.

If there is some way to possibly take a template (Media, Architecture or Music Academy) and go through the CSS to help define for us how it is put together it would be very helpful.

A walkthrough or tutorial of someone taking a template and going through the steps to customize it would be great. Possibly even present a "before" and "after" to show the results.

Thanks again.