David Earley:

I copied all the sh001.mp3-sh011.mp3 to add the shrXXXc.mp3  The c at the end will identify these and will be updating the AT-Database and I will update the K2 with these. But I will leave the old shxxx.mp3 files for the transition and make everything still work. 

All the files must start with the same car and all MUST be correct in AT or issues will happen.