Move files from /mnt project to workspace

I can use Pull or Sync to Domino to move files from a folder in workspace (e.g. /mnt) to a corresponding folder in project (/mnt). But how can I move files from project (/mnt) to the same folder (/mnt) in workspace? I tried multiple ways but all failed - they all force the folder in project to be the same as the workspace but NOT the other way.