Matt,
If you look in your order history under SiteAssist Pro, you should have an item called "SiteAssist Pro: source files with Sculptor presets". In there you can get the source files that were used to create the Corporate layout. You can open the Fireworks or Photoshop file, adjust the graphic/text as needed, and save the new image. In your case, it is probably easier to use Fireworks and use the slice tool to select the exact area you want to save as the new image.