Problem: When I click a song in "My Music" folder, it overwrites any previous Playlist I have in Windows Media Player. I know you can right click and use "Queue-It-Up," but i was wondering If their was any way to set the Default action to Queue the song when i left click it. Any responses are greatly appreciated. P.S. Me and my father have seperate computers, I naturally right click and use "Queue-It-Up" but, my father can never remember to do that, so he erases his playlist all the time.

i don't think you can do that. Why don't you just save the playlist, and load it again whenever. you might find something in the file association though, open my computer, click tools > folder options then goto the file types tab. find mp3 and play around with the default action, notice their are switches after wmplayer /play, maybe you can change that to queue-it-up or something. if you screw it up, just delete the mp3 entry in file types list and the next time you open a mp3 it will ask what to associate it with.