Register Plus Redux

Today I downloaded Register Plus Redux because it seemed to be the answer to many of the problems I was having with the website. However, not to my surprise, it wouldn't do exactly what I wanted it to.
For starters, I can't understand how to select which page the registration form goes on? At the moment it's being plonked on the Home Page which is less than ideal.
Also, when I try to manipulate the way it looks using the customer register CSS section, by copying rule example, and nothing happens? It takes up the whole page in garishly large font. How can I change this?

The plugin also promises to be able to change the WP logo on the homepage to one that we choose. As well as customizing the message in the email to new users. Both of which I have yet to find.

Any help would be appreciated.