how do i setup a small office network and router

Setting up a small network is relatively easy.  Since you mentioned
"office" network I would be very cautious using wireless and if you do
be sure to use the highest level of security offered by your router.


Wired/wireless:
http://www.pcworld.com/howto/article/0,aid,68763,00.asp

Wired:
http://www.smartcomputing.com/Editorial/article.asp?article=articles/2004/w1510/37w02/37w02.asp&guid=

Here is some more info on wireless network setup:
http://www.microsoft.com/athome/moredone/wirelesssetup.mspx#step2

Please let me know if you require anymore information.

Thanks and Happy Networking!