By "Internet thingy" I suppose you mean router? Most routers are set up in a similar fashion. Just follow the instructions on any linksys router, and it should be similar to what your router set up should look like. The IP to access your router is likely to be
http://192.168.1.1/ if it isn't, then try looking for a manual that came with the router if you still have it.
You also need to configure a static ip (I believe it is a static internal IP)
http://www.portforward.com/networking/staticip.htm