ARRM allows Roms to be moved to a subfolder on the same system or to another system's root folder while retaining scraps information and associated images. (merge data with the destination system's gamelist.xml, and update the source system's gamelist.xml)
Here's how:
A popup appears asking you to choose the destination folder, then click on 'OK'.
Validate the movement confirmation popup.
If the destination folder is not at the root of a system (for example a sub-folder) the destination gamelist.xml will not be updated; image files will be moved.
If the destination folder is a subfolder of the source folder, the gamelist.xml will be updated.