ok i solved the white space problem!

#navMain ul, #navSupp ul, #navCatTabs ul {
margin: 0;
padding: 0.2em 0.2em;<<<<<<here for the white space
list-style-type: none;
text-align: center;
line-height: 2.0em;<<<<<here for the text placement
}

now where should i change for the logo to be centralised?