ready to change up to Airport Extreme 802.11n

Hello,

I have been using an AE base station ( the one that looks like a flying saucer! ) and it still is functional. BUT it just does not give off a strong enough signal for me to use my iPad in many areas of the house. Thus, I have now opened up the box to a new AE 802.11n and want some advice about setting it up. I am unsure who set up the old one, but they never used a CD to set it up. They just plugged it in and it goes. NO password, NADA!

NOW for the new one, what is your recommendation? Must I insert this CD and go through it's set up procedure? Or will it work otherwise..... ADVISE please!