Hi Janine, Here is a guide for WMP.
http://www.gnutellaforums.com/tips-t...tml#post274205.

To make WMP your default player, While in Limewire go to Tools > Options > Player. Uncheck, apply and OK. Now Click the library tab. Click explore button lower left corner. This will take you to your shared/saved folder outside of Limewire. Right click on any file. Go to Open With, Choose Program Click WMP and check the box Always use this program to open... Click OK.
Hope this helps.