Do you have a wordpres blog? If yes then you might have known customizing your wordpress blog according to your necessity is very important to make your blog look professional. Here is a way to customize your wordpress blog and change the wordpress logo , link from the login and register page of your wordpress blog.
Here is an example for you to show how I customized my wordpresss login page and changed the wordpress logo and link to my own logo and link.
So I experimented the customization in one of my website oscience.info and changed the normal wordpress login page to the page which looks as follows: