This is a command line utility to remove photos that are in one photoset from another.
Example batch file to remove photos from the Auto Upload photoset that appear in the given photoset ID.
echo off
set arg1=%1
shift
FlickrRemovePhotosFromSet.exe -v -k [api-key] -a [api-secret] -t [Auto Upload Photoset ID] -s %arg1%Licensed under GNU Lesser General Public License v3.0.