How can I make Windows Media Player my default media player for just one file type?

You can assign Windows Media Player to be the player for any file type by doing the following:

1. Click Start and click Control Panel.
2. In Control Panel window, click on the Tools menu, click Folder Options.
3. In Folder Options, click the File Types tab.
4. In Registered file types, scroll down to file name extension that you want (for example, WMA) and select it.
4. In the Details section for the file type (for example, Details for 'WMA') click Change.
5. In the Opens with dialog box, in the Programs area, select Windows Media Player, and then click OK.