127159 Digital Signage solution with

ok here is the project: i have over 30 screen in diffrent locations that need to run the same flash mouvie. All the computers run a simple screensaver software that will dl a .swf from the internet once a day. What i need is the creation of control script thoses could be in BASH or php that will run on the server and verify that each client as dl the flash file and is running it. I need a central way of updating the flash file and to verify that its been updated. I am also open to anyone that got a readymade digital signage solution that can work with a linux server and xp clients. please post to the message board to tell me what would be your solution