Hi
many of these 'Horizontal' log in modules forget to tell you about 'Adjusting module grids"
In your template, (I use Yoububble - Default) choose the module position and set the width of that module.
To help here are the settings I use;
USER1 = 30
USER3 = 15
USER4 = 15
USER5 = 15
USER 3-4-5 are Registered only modules
So the log-in will go across all modules and when the user logs in it becomes a smaller unit and I have added the uddeIM Notifier (Registered) as USER3
Adding pre-text can also make it look nicer
I hope that helps