In order to customize your Socialtext workspace, it's important to have a member of your staff who is familiar with authoring HTML and CSS. If you would prefer, Socialtext offers a service to customize your workspace. If you are interested, please write to firstname.lastname@example.org for details.
Start by reviewing the structure of the interface, and identifying the elements you would like to style. You may have a style guide to start with. Think about how to adapt the elements of your styleguide to your workspace.