5Click Add folders on this computer, and then click Next.
6Use the arrow buttons on the keyboard or the remote control to select a location. When you find the folder that contains the music folder, select it by making sure an arrow appears next to the folder. Repeat this step to add additional folders, click Next, and then click Finish.
7Click OK.
Adding music files from a CD
To add the CD tracks to the Windows Media Center music library:
1Click the Windows Start Button 
on the taskbar, and then click Windows Media Center.
2Click Music.
3Click music library.
4Insert a CD into the CD drive.
5Select albums.
6Select the album CD you want to add to the music library.
7Click Copy CD. The first time that you copy a music CD, you must select the
8After selecting the choices for copy options in the next few windows, click Next.
9Click Yes to begin copying tracks to the music library. This process may take several minutes, depending on the length of the music tracks.
10Click OK.
NOTE: You can select Play Album, Add to Queue, Burn (CD/DVD), Edit Info, and Delete in the album details window from any of these options by clicking any album.
136Getting Started (features vary by model)