On the Source tab of the publishing point, click View playlist editor.
The Playlist dialog box appears.
Click Open an existing playlist.
In File name, type the path to the playlist file you want to open or click Browse to select the file.
Click OK. The Windows Media Playlist Editor opens the selected playlist.
Notes
Existing playlist files can also be opened from the Windows Media Playlist Editor menu by clicking File, and then clicking Open. This opens the Windows Media Browse dialog box in which you can locate the playlist file.
The Windows Media Playlist Editor is only available in the Windows Media Services snap-in.