Right Click the desired image and select Save As.
Choose a location on your hard drive and save the image.
Go too http://www.sprintusers.com/focus
Click the Browse button and select the file you saved
Title your image, this will determine how your image is titles on the phone.
Enter your PCS phone number and click SEND.
It will arrive on your phone as a Notification, select View.
Once the web link is highlighted select Go.
When it warns of it not being a certified image, select Continue.
The image will then be downloaded into the Screen Savers section in the Downloads folder.
Now your done, congratulations, you have a new Screen Saver.