Shoutbox

If you open windows media player, then tools, options, filetypes. Then check the files you wish to associate with windows media player. I know it still opens with it but, just check that mps files are checked.

The will also be an option for winzip with this.

If this doesn't fix the porblem go to control panel, folder options, then the file types tab. Then scroll down to the file types you need to change, click change and choose the program to open it with.