Windows 7: Multiple Network Help

Hello,
I'm new here, I don't usually ask for help, but this one is stumping me.

I have Win7x64 Enterprise Edition. I get my internet access through my landlord's wireless connection, and that works just fine. However, I have multiple systems, including a NAS so I wanted to have my spare router work as a local network with no internet access, just for my personal devices. However, when I do that, it kills my internet access on my wireless connection. The connection does not get any errors and windows reports that it is fine, it just won't connect to anything.

So as it stands, If I want to get my wireless connection to work, I have to disable my ethernet adapter. If I want anything off my NAS, I have to disconnect from my WIFI and enable my ethernet adapter, then disable it and reconnect when I am done. Is there any way to get windows to recognize multiple networks like that without having them interfere with each other?

Both networks are set to use static IPs. I have tried giving them separate default gateways, even going so far as to make my local network a Class A network, but windows always reports that it will cause problems:

Warning - Multiple default gateways are intended to provide redundancy to a single network (such as an intranet or the internet). They will not function properly when the gateways are on two separate, disjoint networks (such as one on your intranet and on the internet).

So, is there a way to have two separate disjoint networks connected to the same computer?




EDIT: Never mind, I got it figured out.

I had to remove the default gateway on the network without internet access. The default gateway is only needed when that network needs to communicate with external networks, such as with IP Routing. Since my LAN does not connect to the internet, I can remove the default gateway. The system will still communicate with any systems on the network within it's subnet. The only remaining problem is that Windows 7 sees the network as a public network.