So this is what I did. I downloaded the template to the spare and did all the tweaks, background url's, width, height, added signature, added new font for headings (KevinandAmanda (dot) com), etc. Everything. And played with it until I was happy. Then, I downloaded the untouched template (from the source) to my real blog and went back and forth, from the spare blog to the real blog edit html, copying and pasting until all was done.
Another hint is when your tweaking, do one thing at a time. Like just width of just main wrapper. Tweak it until you get it right. Then save. If you mess up its easier to "clear all edits" so you know your starting fresh. Its a lot of mumbo jumbo and you dont want to get lost in it.
So the mock up I did was from all the stuff I showed you yesterday. I left it on my spare blogs at chickenista-backgrounds and chickenista-backgrounds2 You can go take a look at how you take what I talked about and put into action. ♥