The theme, the Gantry Framework, and all used widgets or plugins are available in the RocketTheme downloader. There are two theme packages, a standalone and a RocketLauncher build. Use the RocketLauncher if WordPress has not already been installed, and vice versa.
Sources are provided, inclusive of fonts, in the download for Nebulae. You will need Adobe® Fireworks CS3 or later, in order to take full advantage of the editable and layered source PNGs that we offer. Instructions on how to modify the logo are provided in the tutorial section.