This software is a commercial software. You will be able to download and test Butterflies Screensaver 2007 during a certain period of time, then, if it does what you need, you will have to acquire the full version. The trial version available for download on www.softandco.com has a size of 1385 KBytes. For additional information and support request, please contact directly Butterflies Screensaver 2007 publisher.