We would be glad to help you get this sorted out. When it comes to modifying these pages for the User Registration it sounds like you are having success on the front end pages but are not getting the desired result on the back end pages.
When it comes to modifying the back end pages are you using the same approach as you do on the front end pages? There should be no difference in how you interact with the pages to achieve the result. Please post back and include some more info about your specific steps you are taking and the result you are getting with those steps.