I need a free (preferabally open source) lightweight file manager for Windows that can run in a stripped down Windows Preinstallation Environment. It doesn't matter if it is text-based or GUI but must run in Windows PE.
As a side note, someone should create the tag: file-manager
You could try Total Commander, which is Shareware. Supporting every major version of Windows, plus Android, it presents a side-by-side view of files and folders. There doesn't seem to be any pictures on the main site, but you can find a range here.