Hi,
for windows NT and 2K there is a way: you can get all the needed info from registry keys. But to do this remotely (from NETBIOS...) you have to know the administrator's password.
If you know it, you can do a little dictionary, and because all laptops are owned by the same company, maybe the passwords are only 4/5 different kind.
Then a brute force from this little dictionary take 1 or 2 minutes per machines...
I repeat: you havo to know the administrator's password.
But, you can't do it with php, you need another kind of languages, like c/vb.
see you