Instructions
Open Windows Media Player 11 on your desktop or laptop computer.
Select "Media Library," located under the "Library" menu.
Check the option next to "Share Media."
Click "Allow" next to your PS3 icon to give it permission to access the media server. Repeat for any other devices you want to give permission to access your media library.
Click "OK" to save your settings and complete the media server setup.
Turn on your PS3, then select the icon of the media you want to access from "Photo," "Music" or "Video," then open the file.