help writting script to copy file to every desktop

I have multiple offices in my domain
In every office the desktop computer name is prefixed with the office's name
For example LA = Los Angles, NY, etc....

I need to write a .vbs that can copy a file to every machine's C: drive
based on the machine's name
I'd like to run it with command line variables like this

Domaincopy.vbs NY1- C:\Defrag.exe "C:\Documents and Settings\All
Users\Desktop\"

.