I have been search for couple days here for these questions that I have, I have many posts but none of them helps with my issues.

here are the things that need help with:
1. I add new image for my search, but now my search box and button are not in alignment any more.

2. there is a horizontal line within my categories, how do I remove that?

3. is there any way that I hind cart contents (not shown)?

4. which file should I modify to allow my "Shopping Cart" (image/sidebox) visible, even there is nothing in the cart.

here is my site: http://www.the4thmuse.com
Thanks