Simple Windows Routing Question

[Belisarius]

I have a Windows blade with two NICs. I also have two networks - the big one that has real IP's and the private internal 10.x.x.x network. All the machines are connected to both networks - one NIC is connected to the big network and one is connected to the internal network. I assign the IPs, but I do not have access to the router through which both connections travel or to the DNS server - the two networks are defined by IP, not by how they're cabled up.

I'd like all my Windows machines, when talking to other machines that are also on the 10.x.x.x network, to use the 10.x.x.x IPs instead of the real IPs. The goal is to have all internal traffic use one NIC, and all external traffic use the other. As it is now, all traffic heads to the real IPs as opposed to the internal IPs when I ping a computer by name.

I have tried altering the hosts file, but I did not see any change, as my pings continued to go to the real IP addresses rather than the internal 10.x.x.x addresses.

Are there any suggestions as to what I might be able to do?

[Belisarius]

Never mind - for some reason during my initial attempts to alter the hosts file the other day, Windows decided to simply ignore my modifications. Today they worked.