That sounds like a confused question. Assuming your routers are correct, and it really is just a route that you're missing, use the 'route add' command, like this:
route add 10.1.1.1 mark 255.255.0.0 192.168.0.1
This would work if you're currently on the 192.168.0.x network and trying to get to the 10.1..x.x network.
Now you may also want to open the firewalls, so either turn them off temporarily while testing, or add an exception for Windows File & Print sharing. This is done in Windows Firewall, in Control Panel.
Finally, you actually have to be sharing a folder on your computer before the other computer can see it. Right click a folder you want to share and go to Properties, then Sharing. Toy with the Sharign and Security until it appears open. Now go to the other computer and in the Run box type in \\192.168.0.2 (assuming that is the IP of your shared computer).
