STB1035 - CPM 2.2 - User Spaces - Copying files with PIP.COM

Under CPM 2.2 a floppy or hard-drive can be broken up into 16 parts using the "user n" command. The concept is up to 16 different users can share the same drive and only see their files, Files for other users are hidden from them. We can leverage this to help organize files on a disk.
For my hard-drive "I:" I'm configured like this:
User 0: Workstar
User 1: MESCC Compiler
User 2: BSD Compiler
etc......

[fcf]

Great piece of info. But how do you copy files from a user to another on the same drive for example?