This is the maker of Ringo
http://electricpocket.com/index.html , I do not have my mp3 rings on the handheld they are on my memory card which is always in the phone, if it is out I still have the vibrate
Ringo Pro for Treo offers:
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Add amazing MP3 ringtones to your Treo
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Set personal ringtones and pictures for your friends
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Set personal SMS alert tones for friends
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Set different ringtones for address book groups
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Import ringtones from an SD card
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Compose new personal ringtones with our unique ringtone mixer
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Download free MP3 ringtones direct from your Treo
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Purchase and download polyphonic ringtones "over the air"
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Get spoken announcements of incoming calls (with optional EPSpeak)