You can find them in this location (or something similar)
C:\Documents and Settings\All Users\Application Data\Messenger Plus!\Custom Sounds
They are .dat files there, but you can rename them to .mp3 for example
Edit1: remember to keep the original .dat files as well, so preferably copy them to another location first.
Edit2: however they are not stored by name or something, but by ID number.. So if you want to find a specific one, you either have to try them all, or sign in to messenger, and check what the ID number of the specific sound is.
quote:
Originally posted by jtstone1983
(see below)
Those .dat files...just open them using Windows Media Player. Seems to work ok for me 
Oh, didnt know that, that would be even easier 
/ 
