Is there a way to edit the html page that FM generates for User login for Instant Web Publishing?

Why I am glad it has that feature, I would really like to change the way the login page looks.. :)

You cannot edit that page in instant web publishing. You will have to use custom web publishing to edit any of that kind of stuff. You can however link directly to your database. You could make your own web page and have a link on that page that takes you directly to the database that you choose. To get that link just log into your database and copy the link. The user will still have to enter a username and password if necessary but it should bypass that login page (if I remember correctly)

-Tanner