[Samba] samba+cups printing a banner

[Vit]

i set up a print server using samba and cups and it seems to be working fine but in my environment it is vital for each printjob to have a banner with netbios name on it.
eg i have 700 public computers and 4 printers so i need each computer to print a banner with the hostname to distinguish who prints what. i tried to set it up on the client side but it doesnt seem to be working.
any help would be greatly appreciated. 10x