new airport extreme with iMac

[gdog]

i am getting new airport base station delivered today. do i need cd to set up or is all software on intel imac already?

what are set up steps to make new wireless network.

i am going to have 2 seperate networks. one in back of house on old airport and one in front on new airport. i think that will be faster than using one base to extend range of other. thanks for info.
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24 inch core 2 duo, 2.33ghz, 2 gig ram
1 terabyte total ext. hard drive
fios 15000/2000 internet
macbook 2 ghz, 2 gig ram
i got 99 problems but a bitch aint one