I am a newbie to ADSL ( subscribed just a few days ago, see my post down in the topics list ) but what I understand is that if your ADSL modem is an external one attached to your nic card, you need not any driver for it. It should behave as a client on a network with its own IP address. You can ping it and maybe remote configure it.
My Alcatel 1000 works that way in that it behaves as a small website where I can change all of its parameters.
I know nothing about internal ADSL modems.