Will Vapor work with Checkpoint Firewalls?

I have been reading all the great stuff on afp548 (what is afp548 anyway?) about IPSec and VPN. I figured out some great stuff, but the shared secret setup doen't seem to apply to checkpoint firewall clients. On the checkpoint firewall client for windoze It asks for a username and password. I know other users on my network have different usernames and different passwords than I do. does this mean that checkpoint firewall has more than one shared secret, or is something else screwey going on?