Footer Width

I have been trying to get some manufacturers logo’s into the footer (in the form of an image), but I need it to be wider than one single footer widget area, as seen now at http://www.jaguarcooling.co.uk. Is there a way I can combine two widget areas to do this, or widen one?

My feeble attempt at doing this was:

.footer-widgets-1 {
	margin: 0 3.3% 0 0;
	width: 22.5%;
}

.footer-widgets-2 {
	margin: 0 3.3% 0 0;
	width: 514px;
}

.footer-widgets-3 {
	margin: 0 3.3% 0 0;
	width: 0px;
}

.footer-widgets-4 {
	width: 22.5%;
}

But that appears to have done nothing. Any ideas?