My advice might be a bit off, not sure i only work on 2k advanced server boxes myself. But my suggestion would be to take the 2nd NIC(The one you want to be the client), Route the network request through another box maybe through direct connection. Like The 2nd NIC is Directly connected to a 2nd PC, and the 2nd PC's NIC is connecting to the network for the dynamic IP. Its messy but it should work.