The wizard should be going
"You have configured a PPP dialup connection. I see you have an ethernet, 
 do you wish to configure this machine as a gateway for them"

"You are using a dynamic IP address, I will enable masquerading blah blah"
or 

"You have a static IP address. Do you have a range of addresses allocated
by your ISP for the other machines"

and setting up the routes/masq rules

also:

You currently have low security selected. If you are connecting to the 
public internet you may want to change this. Do you wish to update your
security settings ?


and the relevant bits should be in the config tool.