IPsec VPN Setup on SBS 2003

Hi

I have a firewall D-Link DFL-700 which accepts IPsec VPN connections. I
think I have managed to setup the firewall to allow the VPN connection. But
I still cannot connect to the SBS2003. I have enabled VPN on the SBS2003.
But if I have understand it right I have to setup some policy for the server
to accept IPsec VPN. I have previously established a PPTP whithout the
firewall and that works fine. But the DFL-700 dont support PPTP so i have to
use IPsec. Any suggestion on the setup. Maybe there is a walkthrough that
someone nows of?

Thanks