I'm sorry to say that I don't really have time to teach someone how to do web design right now... plus I not long reinstalled windows and don't even have my server running yet so I can't help even if I did have time.
All I can do is tell you about
Firebug
, it's an extension for Firefox. Use the 'Inspect Element' tool to find the CSS info for a certain part of the template.
Then use the
CSS Reference
page to find out what to change. Or take the
tutorial
.
EDIT: If you're happy to wait for a few days, I will take a look. The modern template needs a little updating anyway.