If you have a win 2003 domain with 200 clients.50 clients are in a different network subnet that is separated by a router and they should have 2 default gateways set up for them as well as a static route.
The routes you need set up are similar to the following
for network 0.0.0.0 0.0.0.0 gateway 192.168.7.1 metric 1
for network 0.0.0.0 0.0.0.0 gateway 192.168.6.1 metric 10
for network 192.168.8.0 255.255.255.0 gateway 192.168.6.1 metric 1