back in the day when i got my beast of a dell pc (omg) and then i just instantly had to rip all my music to my pc and ripped loads of my music to it and now im left with about 300 songs of wma files but i want to convert them all to mp3 then delete the wma and put them back in the place of where the wma was... is there any cool programmes out there that i can do this with ?