Dual NIC’s on WIN 95 box

I have a network consisting of two computers connected via netbeui which works fine. I now want to connect one of the computers to the internet via a dsl modem and a second nic. I have bound only tcp/ip to the second card and only netbeui to the first card. I can see the other computer but I can’t ping the dsl modem. Is there some way of making windows 95 select the correct network automatically?