Using the file manager you can rename an existing prompt file.
Procedure
Using a web browser, log into the web management menus for the server hosting the voicemail service.
Click Applications and select File manager.
Select the VMProCustomPrompts directory.
Click file you want to rename to select it.
Click on the Rename icon.
Enter the new name and click OK.
After making any changes to the set of prompts, click the Apply Prompts icon. This copies all the prompts in the file manager VMProCustomPrompts directory into the Custom Prompts directory used by the Voicemail Pro application.