The third step of the installation allows you to choose a Flash intro for your website. 

If you do not want to select a Flash intro click the link on the top of the page.

If you would like to have a Flash intro, navigate through the Flash intros on the left panel and select one that best suits your company. By default the Company Name and Tagline text boxes are filled in with the company information you specified in Step 1. You can change them here and there is also an option to add extra lines of text to the Flash intro. After you are finished click on "Choose This Introduction".