[Conkeror] Password management in Conkeror (revisited)

['Mash]

I know this question has been asked a lot but I am yet to actually find an answer; or more so one which I can understand in terms of what to put in .conkerorrc.

How does one turn on password management?

I have tried both:

session_pref("signon.prefillForms", true);
session_pref("signon.rememberSignons",true);
session_pref("signon.autofillForms",true); 

and 

following...
http://developer.mozilla.org/En/XULRunner_tips

pref("signon.rememberSignons", true);
pref("signon.expireMasterPassword", false);
pref("signon.SignonFileName", "signons.txt");

You also need to get an instance of the login manager service, which internally initializes the system:
Components.classes["@mozilla.org/login-manager;1"].getService(Components.interfaces.nsILoginManager);

BUT, since I am completely unknowing I don't quite understand how one uses the "Components.classes[..." and how I "get an instance or the login manager..."

Sorry to ask this again but it really is not clear anywhere that I know.

Thanks

'Mash