To center the vBulletin logo above, we would add the following to the additional.css template:

Code:
.logo-image {
clear:both;
display:block;
float:none;
text-align:center;
}
Some logos may need to then have some padding applied to them to move them down so they don't run into the Welcome tabs. You may add padding to the CSS above if you need to do this (change the padding in red as needed):

Code:
.logo-image {
clear:both;
display:block;
float:none;
te
...