"Add URL/Capture URL" mechanism -

I have scanned roughy the above in these two years forum (back to 2004). Most
said this may work, or not, depending on the authentication complexity
(javascript ? multiple redirections with cookies ?). Is it still existed with
the updated version of Httrack?
Also, some forum thread said I need to fill in the form firstly. And "just"
before I click submit, I need to open Httack to launch it. So what is the
"just" timing mean? Also, does I need to open my I.E. in another window with
the form filled (but not submitted?) and then I launch Httrack. I suggest if
it is that then after some time, I then click the submit. Am I right for such
suggestion?
I dont know how the above "submit" timing is administered exactly? Also, how
can I do with the cookies mentioned in the first paragraph above if the form
filling method cannot worked?