Configuring for Windows Dial-up Connection authentification.

friends, I have configured a Dial-in server with Suse-8.0 with mgetty. Only win9x Clients are dialing In with windows dial-up Connection. For Authentification right now I have made windows connection to popup post dial window where they type in User name and Password. I would like to give them facility to enter username and password in windows dial-up connection properties and that connection should send username and password for Linux dial-in server. how to do this ? Best Regards R. S. Patil