Mass rename
From EMule Wiki
Select a bunch of files in the sharing window and apply the same process on them. i.e. add a prefix to them , or remove a postfix.
Note: The "Show More Controls" entry in Options > Extended needs to be set (checked) in order for the mass rename context menu option to become visible.
See also
There is a stand alone version of this tool created by stulle: [batch rename sf site]