There are a lot of other themes to choose from… first off, do you have the latest version of the slider? Get it here. Once you get the latest version, you can choose a different theme, from the ones provided in the download, as a base or get more themes from here.
In the css, look for “anythingControls” to style the overall block (includes the slideshow button and navigation tabs), “start-stop” styles the slideshow button, “thumbNav” is the UL that wraps all of the navigation tabs and “.thumbNav li” to target the tabs. Additionally, the tabs have “cur” class for the current tab, and “first” and “last” class for those respective tabs.
For more information, please refer to the wiki theme documentation.