Register Plus installation

I’m having difficulty with installation of Register Plus. I’ve read as many posts as I can find and nothing solves the problem – that I can see. I’m a newbie and not a programmer. Does anyone know of step-by-step instructions for this plugin? Is a sidebar required (my site is 1-column)? Should I be seeing the wp-login.php file in the list of files I can edit at the dashboard?

thanks for any help at all.