custom registration

Hey, guys, I've been working very hard on my forum lately, so I have a few questions to answer. The first question: I am currently trying to display the content of register_form on a different page. (So that people can register on another page where they also have their login). So I simply tried...

I know about creating a custom user field for the purpose of getting a new field on the registration form. Doing that, however, always seems to create the field also on the user's profile. And if the field is marked "required" (for registration purposes), users who just want to change their...