HP dv6000 cannot connect to internet

Okay... So, I am doing this for a friend because he cannot access the internet. I have tried helping him along the way but its just hard and the face that i live 2 hours away dosen't help. So, anyways he recently formated to XP on his HP laptop, and his computer is not recognizing his ethernet controller, he is running service pack 1. He was on vista before, and obviously wanted to "downgrade". I went onto the website to download a ethernet driver and I downloaded the NVIDIA nForce Chipset Driver and Network Controller, he says when he opens it it shows the nvidia logo says its preparing files, then just closes. If anyone has ideas on how I can help him please tell me.