I would bet that on the bottom of the router is the instructions for how to access the administrative tools. Connect your computer to a lan port on the router and enter the ip address on the bottom. I would also guess that either in the manual or on the bottom is the default username and password. Also, there might be some software with it that could help you, although it may be windows only. I would recommend reading some of the manual and returning with a more pointed questions. Setting up a home network is not difficult, the learning curve is surmountable in a few hours, but with out details about your existing setup no one can just tell you what to do.