Thanks karlfranz for all your thoughfull work. I like these better then he music I have been converting.
To make then work in 7.4.1, as has been posted here many times:
SAVE A COPY OF THE "iTunes Library" FILE TO GET BACK TO WHERE YOU ARE!!! (My files(iMac) are in Users/David/Music/iTunes)
Put the .m4r files into a folder (call it whatever you like).
Double click on EACH file (not much happens here).
Next, right click on each file, select Get Info, and change the .m4r to .m4a
Now sync iPhone
If you don't like what you get then close iTunes, copy the saved "iTunes Library" file over the current one and restart iTunes.
Back to where you were.
If there's a better way to do this in 7.4.1 please post it.
Thanks again karlfranz. You still did all the hard part.