I login form if the user had account already, he just logins with username and password. If the user does not have account, he needs to register first, so can I add extra fields (like dropdox box, uploading a file..etc. using this component, only when he registers.

Any help is appreciated.

well you can add those whenever you want,if they have to register or those allready registered...doesnt matter..

but point is that you have to notify your members that they have to update their info....otherwise the fields stay empty for them..