I was able to set mine up using the steps and website provided. It is a little cooler than the Cisco VPN client because the Apple one gives you the toolbar at the top of the screen. Go to Network under system preferences and click the plus sign.
Interface=VPN
VPN Type (will pop up next): Cisco IPSec
Service Name: Whatever you want
Open your PCF file with TextEdit.
Server Address should be under Host
Your account name is your personal VPN account name, like a employee number or user ID. Usually different for every user in your company.
Check off Show VPN Status in Menubar
Authentication Settings..
Open your PCF File with Text Edit.
This will give you a Group Name.
My GroupPwd was blank, but it gave me a enc_GroupPwd
I took this long and crazy value and pasted it into the website someone provided earlier.
http://www.unix-ag.uni-kl.de/~massar/bin/cisco-decode
Sure enough, that gave me the password to put under shared secret!
That's it, you can now connect and it will prompt you for your PIN and SecurID token number like usual.
At this point, you no longer need a pcf file, you can just connect using a toolbar at the top of the screen. Very handy!!