You can install it like this:
1) Make sure that your PC and router are connected, and that the PC is
getting an IP address from the router.
2) Go into your browser and type
http://10.0.0.138
3) You should now find your self on the web interface for the router. There
is a quick setup wizard available to you. Use that to enter your
login/password for your ISP.
4) Go into the "Connections" section of the menu and make sure that the
router is connecting to your ISP correctly.
If all is well, you should be able to use the router with your new ISP.