Trust me, I am babying you.
Kimba, I completely understand your frustration. Working with this stuff is not easy. X-Cart makes it easier than anything else in my opinion, but even then it is difficult.
I have made you a video that takes you step by step through this process:
http://youtu.be/bir1_EdpUX0
I even had to install a new copy of the cart so that I could be sure that we were looking at the same thing. So I am going the extra mile in order to help out.
Actually had to install the thing twice, I had an issue on my localhost with XC5 and had to install it on a Linux server in order to get the custom css page to load. That shows you how often I use the custom css! I never noticed it before. Usually I am writing CSS directly through my skin modules.
Hope that helps, if you have any questions feel free to ask.