China DOS Union

I want to write a BAT, but I don't know whether it can be done.
Runtime environment: there are three machines on the LAN: BACKROOM; POS01; POS02.

Operating system: BACKROOM: WINDOWS2000
POS01: WINDOWSXP
POS02: WINDOWSXP

Permissions: BACKROOM: username: administrator password: aa
POS01: username: pos password: aa permissions: partially restricted user, can log in and can access, copy, and modify files on the drive.
POS02: username: pos password: aa permissions: partially restricted user, can log in and can access, copy, and modify files on the drive.

IP address: POS01: 192.168.18.1
POS01: 192.168.18.2

Now I need to COPY the file TEST.TXT (d:\test.txt) from BACKROOM to the D drives on POS01 and POS02 (not set as shared); and COPY C:\TEST1.EXT to the C drives on POS01 and POS02 (already set as shared).

It would be best not to use external commands.

I've been thinking about it for a long time and still don't know whether it can be done??