Automated PowerPoint Kiosks

Here is what I have,...

The Kiosks:
-Belong to Workgroup called KIOSK
-Mapped drives to domain machine with domain credentials.
-Local D:\Training drive\folder for the local storing of PoweerPoints and Playlists

The Domain Machine [KioskServer}
-XP with share called KioskServer, kiosk mapped to this share.
-KioskServer contains original PowerPoints and Playlist files.

...and here is what I am trying to do.

1. I want the group of people that will be updated powerpoints/playlists to drop the originals at the KioskServer share on the domain machine [XPsvr]
2. I want the Kiosks to copy the PowerPoints and Playlists from the KioskShare to themselves, then play the shows by using Playlists [Note: playlists will reference other playlists, creating the loop].
3. At the end of the last playlist, before we reference playlist1 again, I need a mechanism to tell the machine to copy [thus updating] the PowePoints and Playlist files, THEN go back to playlist1.

Any ideas on this. I could setup a Scheduled Task for a copy, but if there are files in use and all that while copying, I don't want to kill the Kiosk.