Customizing the login form in the MU theme

I’d like to add a login form form similar to the one seen on this site to an wpmu+BP site I’m building using the mu theme. The form would display the following in the upper right hand corner:

1. Username – Password – Remember Me – Login / Register.

2. I’m using the wp-fp connect plugin and would like to add that button to the bottom as an option.

3. Once logged in the form displays the users avatar, dashboard, and any other links.

After looking through the files I realize that I have no idea on where to begin. Would I be replacing the existing login form with the wp-fb-connect widget-form-code? Not sure if this request would be considered a hack so apologies in advance if in the wrong forum.

Any responses appreciated.