Gus Perez has posted the binary and source for a little utlity he has dubbed “ezClip”;
Back in the 7.0 days I wrote a little tool called ezClip. It’s sole purpose was to allow me to copy/paste files from one command prompt window to another. Our test tree can get pretty deep directory-wise and having to provide full paths to ‘copy’ was a pain and instead I often ended up starting up two explorers, one from each window, and then copying via the GUI. This tool made this process much more painless.