Changing main page background to transparent

Hi everyone, I am using v1.3 and my site is http://www.reversegarbage.org.au/catlog
I am wanting to know how I can change my sidebox and main page background to the green background...Something like http://www.biome.com.au
:unsure:

First change the extention of your extra stylesheets like

stylesheet1.css
stylesheet5.css

to anything except .css

each .css is read and parsed in order

Post back when done as currently difficult to determine which is responsible

Ok now I have done that...Now I need to make the sidebox "Shopping" transparent as with the main page.

Find these 2 entries and make the background color transparent and you may want to remove the border entry in the other

.sideBoxContent {
	background-color: #ffffff;
	padding: 0.4em;
	}

.leftBoxContainer, .rightBoxContainer {
	margin: 0em;
	border: 1px solid #ffffff;
	border-bottom: 5px solid #336633;
	margin-top: 1.5em;
	}