Copy file when log in to the pc

Hi there, I want to setup a batch file to copy a file from my company server
(Windows NT 4.0) to all our company PCs over a LAN. How do I setup the
parameters to address the network definition for each PCs?

============== Example ===========================
xcopy C:\PROGRA~1\GRISOFT\AVG6\UPDATE\*.bin \\dan\update
xcopy C:\PROGRA~1\GRISOFT\AVG6\UPDATE\*.ctf \\dan\update
============== Example ===========================

This command only work for one PC, how to copy to all PCs & how to copy 2
type of file in one statement?

Regard
Dan