vertical categories-want 3 rows

Trying to get 3 or 4 rows across for category listings.Looked everywhere in admin and i cant find the fix-have rows set to 3 and doesnt help-easiest way to explain this is to show it.Only alteration is changing the code to 100% so the cart fits to page,dont know if that has altered the vert and horizontal rows.
http://www.hughessolarenergy.com/zeus/
how do i get the categories to run across instead of vertical?

You have altered the style sheet in a manner not allowed:

You Have:

#logo, .centerBoxContents, .specialsListBoxContents, .categoryListBoxContents, .centerBoxContentsAlsoPurch, .attribImg {
	float: center;
	}

By default this is:

#logo, .centerBoxContents, .specialsListBoxContents, .categoryListBoxContents, .centerBoxContentsAlsoPurch, .attribImg {
	float: left;
	}

center is not a legal value and you ca see this at Float allowable values

Change this to left and you will get your three per row.

fixed,thanks.