
I haven't written it yet...
But I do remember helping AZed add that capability to
EBook-Tools on CPAN (Perl code repository).
I'll see if I can use AZed's code to create a functional 'impedit' command line program, but I know a GUI solution that works quite well,
ConvertIMP.
What target program would you prefer to use: Windows executable or Unix/MAC Perl script? Any syntax you would like to see used for the option/parameter switches?