Welcome to the forums Sabrina.

To use the music as ringtones, you should (I say should since I haven't tried it, but I have downloaded regular ringtones) be able to go into Profiles and have those songs available in the list of ringtones

Click on Profiles, scroll down the Advanced, highlight Profile name, press Menu button, click Edit, click on Phone and change the 'Tune' to your song.

Thank you for your welcome. The first time I tried that, it locked up and shut down. It worked the second time, but is silent, even though I have the ringer volume on high...