Ok, I sort of found what I was looking for.
Sample Login Form
The HTML below allows a login from any of your own pages. The “returnurl” is designed to tell VP-ASP which page to go to after a successful login. If unsuccessful the default login page shopcustadminlogin.asp is displayed.
<FORM action=shoplogin.asp method=post>
<INPUT type=hidden value=shopdisplaycategories.asp name=returnurl>
<INPUT type=submit value=Login>
I got this straight from the faq page, one problem is that on successful login it's suppose to re-direct to the returnurl page I set, but everytime I have a succesful login, it always takes me to the shopcustadmin.asp page. Does anyone have a clue as to why that is?