Hi Glen. How's things!? I'm on to pick your briain on a new category I'll be adding to our site soon. I've added it in a test site at:
http://www.silkblooms.co.uk/wholesale/
You'll see from the above URL that I've added a new main category called "Artificial Home Flowers". The idea is to open out a full new set of sub categories, similar to the wedding flowers above. However, it looks quite bad and blends in with the wedding flowers too readily. So, I'm going to make it look like this instead:

Much better, but I'm in two minds how to tackle it. OK, so the Wedding Flowers is easy enough to place in teh top chcategoriesHeading. I just need to edit a file and change the text. It's the other one that'll pose the challenge.
I'd imagine that creating a new side box would be the wrong way to go as it'd too much of a task to add the new category tree to it. So, I'm betting there's a way to replace that catBoxDivider1 line with a .jpg or .png file instead? I'd lose the Google ranking on the key phrase if I make a graphic header for the category but I think it's the easy way to go here.
Any ideas or suggestions for me?