BlackBerry 7100 / 7105

I know this phone doesn't come with an mp3 player, but is it possible to make mp3's as your ringtone, incoming messages etc... i ask only because i'm thinking about buying this phone, and my friend has a v620 and he can use the included software/data cable, and actually put mp3's on the phone, to use as ringtones, even though there is no built in mp3 player, the phone still recognizes the mp3's, does anyone know if the 7100 can do this?

thanks