I put the unzipped file in the .rockbox on the sd card. I then rebooted into the original player. went to update got message no update file found. rebooted into rockbox and found no change. How do I overwrite?
You do not need to 'update' from the original firmware.
Just unzip the downloaded file to the sd card, overwriting the exisiting files.
Next time you start Rockbox it will used the updated files, no extra steps needed.