sony ericsson w595

How do i create a ringtone on my LG Xenon?

I have several audio files that were ringtones on another phone. I Bluetooth’d them to my new LG Xenon, but it saved them as audio files, not ringtones. When i go to the ringtone menu, they’re not there. Nor do i have an option to use them as ringtones from the audio file menu.Content by...