Hi topdog77, here's what you need to do:
1. When you record a voice note, the BB saves it with a filename in this format
VN 0000X.amr
2. Voice notes are automatically saved in /Media Card/BlackBerry/voicenotes
3. You just need to move that VN file of choice into the ringtones folder
4. Once done, just go into your address book, look up, say the wife, and add that VN as a custom ring tone...
That's about it. Good luck!
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