quote:
I was thinking as soon as there address starts to ping
I assumed from this means he knows the IP address.

Net send from the login script is ok, however if the user in question doesn't log in of course there is no login script to put it in.

If the client uses DHCP there are two options
1) If he has a modern DHCP/DNS combination the leased address will be added via DDNS update, so he can ping via the host name instead.
2) If a cranky old NT4.0 solution switch on logging and simply poll todays log file waiting for the lease to appear.

The other problem with using login scripts or polling the DHCP log file is that it won't tell you if the PC is already there.