Why would you have to re-record it for each person? LoL. I'm not familiar with the built in sound recorder but there should be plenty of others in the market. Don't quote me on this but there should (and if there isn't, there should be!) a multi track recorder in the market. You record your layers, mix it and then save it to your sd. Then you shoot everyone over an e-mail.
thats not what i mean. in my studio ill out together a small sample about 30secs long and compress it to around 300k and put it on my old phone under "my_sounds" then I can text that to people as a sound message that could be used as a ringtone or sent with a pic