Background Material.info

I bought a template and it says it comes with 3 colors. When i open up the template folder the is three sub folder in it. They are: html, psd, and xhtmlcss. The default color of the template is red. I want it blue. To make it blue you have to open up the .psd file and delete the red layer. But, i want to use dreamweaver to make the website. And i don't know if you can delete layers through dreamweaver. So instead i changed the photoshop one to blue and saved it as a html. But before it saves you have to add slices. Then when i open up the file in dreamweaver i can only edit the slice like move it around or delete them .IS their any way to change the template to blue and be able to change stuff through dreamweaver