I currently have two ISPs, each with its own router. I would like to connect them both to my PC, so I can game on one ISP, and BitTorrent on the other ISP at the same time.
You should add a second network card with 2 different ip adress range for example
First router gateway 192.168.0.1
the networkcard associated to this router should be
ip 192.168.0.75
sub 255.255.255.0
gateway 192.168.0.1
dns 192.168.0.1
secound router gateway 192.168.1.1
the networkcard associated to this router should be
ip 192.168.1.75
sub 255.255.0.0
gateway 192.168.1.1
dns 192.168.1.1