Get a dropdown login like WPMU


I really want a dropdown or modal login on my multisite instead of the boring standard login screen. I have checked this thread out:
and found out i may have to use this:
but how is it possible to implement this, into my site? I can't figure it out.

Note: It is not possible to use some modal login plugin, because i have a mu-plugin that redirects the users to their own blog, when they log in on the mainsite - and it does not work with other login plugins!