Basic questions re setting up pptp

[Carpet Nailz <carpetnailz researchintegration org>]

Do you have instructions anywhere for how to set up pptp using Network
Manager on OpenSuse 11.0. I looked at the Network Manager web page but
didn't see any detailed info there.The only thing was this, which isn't
much help:
"Simply install the NetworkManager VPN plugin your site uses, and
pre-load the user's machines with the VPN's settings. The first time
they connect, the user will be asked for their passwords."

According to Yast, Point-to-point tunneling protocol (PPTP) client is
installed.

I've tried the following without success (not sure what's supposed to go
in each spot):
-Rt click "Network Manager" icon and select "Edit Connections"
-Select VPN from tab
-click "Add"
-Enter connection name
-Don't know what to do with "Connect automatically" and "System
Setting"?
	-Does "Connect automatically" mean it will connect each time I start my
computer or what?
	-What does clicking "System Setting" do?
-"Method": Is this the method used in the LAN I'm connecting to?
Assuming that, I leave it at DHCP.
--Addresses: I add the public address for the Watchguard Firebox that
manages the LAN at the target location and the Netmask and Gateway for
the DSL modem.  Is this right?
-I leave DNS Servers and Search Domains blank.
	-The former because with DHCP that shouldn't be necessary, I think.
	-The latter because I don't know (and don't see any documentation) what
it's for.
-I then click "OK" and nothing happens--the connection does not appear
in the "Network Connections" dialog where I was trying to add the
connection.

Thanks.