I have a FritzBox 7390, but the wifi range/coverage has finally got to me and I want to use a second router to provide the wifi connectivity. I used to do this with my old Linksys modem/router, using a TP-Link wifi router. There was a small setup process which I think had something to do with setting up one of the ethernet ports as a WAN. I've tried googling, but I'm not quite sure what terms to search for to get the right results.
Can anyone point me to the instructions I need to follow to disable the wifi on the Fritzbox, and then to connect the TP-Link to the Fritzbox to handle the wifi side of things?