Message On Wedding Programs How Do You Put A Ringtone As A Message Tone On A LG Neon?

How do you put a ringtone as a message tone on a LG Neon? - message on wedding programs

I have on my cell phone ring tones and I can not find a way to configure it as a voice message. only songs that are, for setting a tone of the message is the character that is included with the phone. Neon is for LG, AT & T