a script for mac address

Hi all

i need a script to let mac address added automatically when a user first time login with his username & password instead of typing it manually.

in other word
mac address in pppoe stay empty until the user first time login,then his mac will be filled automatically.

version 3.14
hope you understand what i mean.
thanks

hello

u find the script to let mac address added automatically when a user first time login with his username & password instead of typing it manually ???

i need this script plz send it to my yahoo ID: engmoh81@yahoo.com