Tried that...didn't work...somehow, after I change the .wma to .mp3 using windows media player, none of my players (iTunes, musicmatch) can play that file.
The problem is actually with iTunes.
See, I uses Nero to burn my CDs usually.
I can add files .mp3 and .wma to Nero and it'll burn it into a CD.
However, the format I've gotten from iTunes which is MPEG-9 or something like that is not recognize by Nero.
Therefore, I can't compile all my songs together and custom build a music CD for myself.
Thanks for everyone's help though