Thanks for this great template!!

I'm trying to use it without sideboxes but the zip code box (and this box only) goes to right, instead of staying below the text, when I paste the following code into stylesheet.css as per instructions:

#centerColumnWrapper2 {
background:#ffffff!important;
}

.centerColumn {
float:left!important;
width:95%!important;
}

I've enabled the grey color and everything else is working perfectly.
Thanks for any suggestions!!