I've had similar nightmares. I have found a a few ways to get back in.
Here is the first one. It's from John Mitchell. Check out his post here:
http://blogs.snapsis.com/CommentVie...11906.aspxAnd here is the second, from Will Strohl
http://www.willstrohl.com/Blog/tabi...-Page.aspxAnother way I have devised is to have a second portal on the install that has a valid working login page. I can login there and go to the host, portals and edit or view the non-working portal from there - already logged in as host. That one takes some pre-planning unfortunatly.
And last of my suggestions is a concept only as I have not tried it yet, since one of the above has rescued me each time. Is the idea that a person could conceivably get access to the database, and insert a new login module on any existing page.
In your case, since it says one or more modules are not loading on your page, perhaps you could actually remove the other modules from the login page until only the login module is left. Maybe the page would load then??
I hope you get in. Lots of us know what you are going through. - Mark