This is in it's very early stages, but I'm running into a few roadblocks in customizing this template.

The site is here:
http://zingslings.com/awe/

There are 3 things I want to do but am unsure how.

1. Categories
-you'll see the categories (baby, bath, body...etc). I'd like to make that text bigger, however keep the 'home, login' text at the top the size it is now. Is this possible?

2. The background showing behind those category links. I've created this image: http://zingslings.com/awe/includes/t...gheader_06.gif to show at the very top to match up with the graphic. However I'd like just solid brown behind the category links, as well as at the very bottom of the site. So I created the new image and named it ngheader_07.gif but am unsure where to put that in the css code.

3. I would like to give a better look to the center of the store (the big white box that just kinda jumps out at you). I'd like to give it some rounded edges. I can easily do this in photoshop - but the question is - where do I put the image to make it line up with the top and bottom of the white box to give it a nice rounded square look?

I really appreciate any help you can give me. Like I said the site still has a long way to go but I don't want to go any further until I have the above mentioned things figured out.

Thanks.