I have a question. Our ISP is upping the game from 10mbps, to 100. I purchased a new cable modem, and router that will handle the new speeds. Been years since I've had to do a setup for these items. Do I connect the modem first, then call the ISP to give them the MAC number, then hook up the router and install it? I feel like an idiot. Maybe I'll get my son in law over here to do it.
I did this a few years back. My memory of it isn't flawless, but I don't remember this being a big deal do to at all.
The steps, as I remember it, were to connect the new modem and make sure that all the lights/etc come on. Then calling up tech support so they can activate/add the modem (as you said, you'll need the MAC address). There may have been a modem reboot or two in the next portion, but then after that, you just plug in your router as you would normally, and then configure that as you want.
You could have the router setup before then honestly, either by using the old modem, or using the new one before it is activated (just won't have internet access obviously).