I'm about to upgrade to a more powerful router to get better service in the remote corners of my house, and I'm wondering if I can just set up this new router without touching the old router? I have a cable modem that supplies my internet and it has 5 ports like the one that goes to the current router. I would prefer to keep the current router working until the new one is confirmed to be working properly and have internet, to keep my family from bugging me about when the internet will be working again. Any thoughts?