The link has the correct information but don't take it completely literally as far as what the css you are looking for is, in jqueryui-1 skin it is like this:
.logolist,.pageicons,.skiplink { display:none; }
so change it like this:
.pageicons,.skiplink { display:none; }
and make sure you don't have the css caching
Then in site settings you will see where you can pick the logo, if you have a custom logo put it in /Data/Sites/1/logos folder to make it show up as a choice.
Hope it helps,
Joe