This is about the time I call the Geek Squad (or similar people you know locally) to come do it for me

http://www.geeksquad.com/services/detail.aspx?id=159

From what I read, the "real" N's won't be out until September so you have a pre-n wireless thing but it sounds like you want an N router which can go G (backwards compatible) rather than the G which can't do N. It's the router not the Toshiba that has to be N to G?