Anyone know how to convert m4p to mp3 please??

I have purchased a number of tracks from itunes but have been bought an mp3 player. Unfortunately it dosen't support Apple's lovely format n I'm left with a lot of tracks I can't listen to on the move. Does anyone know hoe to convert em to mp3 or am I stuffed??

 

You could burn them to an audio CD and rerip them to MP3s with iTunes or you could use iOpener http://hymn-project.org/download.php (near the bottom of the page) to unlock Apple's DRM and use a converter like dBPoweramp http://www.dbpoweramp.com/ to convert between the two formats.