Flash2X Screensaver Builder 

Flash2X Screensaver Builder allows you to easily create a screensaver using flash movies or videos. You can add a title and publisher information like homepage, contact email, copyright information, and logo. Then, you can add the movies and change their order, or simply tick the option to play them randomly. The program even includes a built-in previewer that allows you to view the videos. However, it offers no buttons to stop, play, rewind, etc., which is rather uncomfortable.

In the settings tab you can add license information and customize the expiration period, add unlock code, and purchase URL, among other things. Finally, in the output tab, you can change the file path, add log messages and generate the screensaver installer. It also would be great if you could trim the flash videos, or add captions, templates, or other things to your screensaver.

In short, Flash2X Screensaver Builder is a simple application for the creation of screensavers with many good options but lacks others very important features to be considered a professional application.