Template: Change width of separators, how?

Hello! I don't know what this is called, so I don't know how to search on this forum for similar posts. I've attached the stylesheet and the tile_back.jpg from the template in case it would help you to help me! Here's a link to my site where I am starting to get into changing things.

http://katiesconsignments.com/zencart/

I am using the Pretty In Pink template found in the Template section on zen-cart.com. See the 5 purple/pink lines that are being used as separators? The second one is showing my Categories, but these separators aren't wide enough. The file name of the separator is tile_back.jpg. I've tried editing that file directly, but my width/length changes don't take effect on the template.

Can you point me in the right direction to where or how I modify the width setting on these separators?

Fix my problem for me and I will make sweet love to you :hug:

Thanks for any help!!!

EDIT: erm, I think it's the height--or thickness--of the separators I need. They are already long enough. I just need 'em bigger so my Categories fit onto them instead of outside of them.

SOLVED, I guess.....I used Mozilla Firebug to edit the part of the stylesheet that said "navMainWrapper, #navSuppWrapper, #navCatTabsWrapper " . . . .changed 30pixel to 60pixel. It helped, but still doesn't look great.