Hi ControlSee,
Visit this page
http://bifrost.slu.se/index.en.html
Here can you read about a software sollution with free downloadable distributions of the software.
This produkt is a joint project among the universities in Sweden and is widely used to secure logins in networks (as well as wireless).
And on how tu configre an duse ipsec go to,
http://www.microsoft.com/windows2000...ec/default.asp
And you'll find "everything you always wanted to know about ipsec, but was afraid to ask".
But as I said before, it all depends on if you wish to keep people out from your network (only) and/or to keep the content (traffic) secure.
This creates a 2 level approach and should be measured from the traffics content point of view.
But if you use ssid on the access point and client, turn on wep as high as possible AND use hard coded mac address accesslists in the access point only allowing known mac addresses connect, will you have a normal security for a network with low risk content (i.e normal office work, private and similar). If you run company secrets (big secrets, military or police type of traffic, then encrypted traffic ontop of the wireless is a must).
Saludos
Kenth