add to "Copy of %name" %ext var (sf.net)

Hi,
can you change the way of the "Copy of %name" string?
So it have a %name and a %ext var? So i (and every other) can use "%file (copy).%ext"
So %name = "somefile" and not %name = "somefile.ext" and %ext = "exe"/"jpg"/"gif"/*
This is because i sort all my Files by name and if there is a copy of the file is under c and not beside the original file.

It will be really nice if you can integrate it
(migrated from https://sourceforge.net/p/copyhandler/feature-requests/7/).