I tried to google for the below phrase (and many others) :
Looking for a document shows step by step walk-through how to configure Cisco Systems VPN client v5.0.07 (IPSec) to connect a mobile laptop (windows 7) over the internet to a small LAN office behind one of those branded router (D-link, Netgear , Linksys,,,etc).
Previously I have used TheGreen Bow but not Cisco System VPN client
Below Cisco URL wasn't too much helpful for me
I found a video on YouTube.
BTW, this is what I searched for: http://www.google.com/search?q=configure+cisco+vpn+client
I think your search was too specific.