Applications :: VPN Connection Using Mac OS X's Built In Network Preferences?

For school, I need to set up a VPN connection to be able to connect my MacBook to the internet. While my school offers the Cisco VPN Client with a preconfigured PCF settings file, I would much rather use Mac OS X's built-in VPN capabilities, through the Network Preferences. Now, my problem is that I don't really know what to do to get this working. Using an online password decoder, I already found out what the password for my school's VPN connection is. But how do all the settings translate between the Cisco VPN Client and Mac OS X's VPN configuration screen?

The PCF file tells the Cisco VPN Client to use Group Authentication, with a group name and a group password (the one I already decrypted). These are already filled in. When starting a connection, I am then asked to fill in my student login details. Now, in the VPN settings screen in System Preferences, there is a box for Account Name. Am I right in thinking this is the box where I fill in my student ID? Or does the group name go here? Then, when I click Authentication Settings..., I can fill in a password. I assume this is where my student password goes? Or should I fill in the password I decrypted?.................