Instructions
Connect your PS3 to the same Internet network as your computer. The PS3 can be connected wirelessly or wired with an Ethernet cable.
Open the media player that you want to stream on your computer.
Enable your media player's media streaming feature. This can usually be found in the "Settings" or "Options" menu. Refer to the user manual for your media player for instructions on how to enable this feature.
Turn on your PS3 and scroll to the "Settings" tab.
Select "Network Settings" and set the "Media Server Connection" option to "Enable."
Scroll the media tab on your PS3 that corresponds with the type of file you wish to play. For example, if you want to play a video, scroll to the "Video" tab.
Select your media player to browse available content. An icon for your media player will appear under the "Video," "Music" and "Photo" tabs on your PS3. You can access all of the corresponding files that are stored on your computer's media player.