VPN with MacOSX and LinkSys WRVS4400N

I got a LinkSys WRVS4400N Wireless VPN router and successfully setup a VPN client for Window XP Professional. I had Walter give me a hand with the configuration since it's been about 3 years since I last touched my first VPN installation. Then I turn around and get a new MacBook Pro.  The router came with the VPN client software for windows, but it turns out after talking with LinkSys, there is no client software available for the Mac.  They suggested I return it.So after looking into options to set something up for the Mac, I find out there is a VPN client that comes with the MacOS.  I tried to set this up, but was not successful.  The Mac VPN clint requires a shared secret, which I can't find and option for on the Router.  Anyone have any ideas?Well we got no ideas and I've since sold the product to someone who didn't need a MacOS VPN client.  Closed the question.Bob