Get Header Child Theme

Hey all, something of a WordPress noob and not really php savvy. I’m good with HTML and CSS though.

Here is my dilemma. I am making a site that I am creating a child theme for from the Responsive theme and I want the home page to have a different header than all other pages.

I’ve read the Functions content in the WordPress codex but I’m not sure how to use it exactly, especially with a child theme.

This is the code I got from the codex, but I have some questions….

<?php
if ( is_home() ) :
	get_header( 'home' );
elseif ( is_404() ) :
	get_header( '404' );
else :
	get_header();
endif;
?>

1. Where do I put this bit of code? Do I have to put it in every other php template such as single.php and page.php?

2. Where it asks “is_home”, how does it determine the page “name” is “home”? Where does it grab that information?

3. When it calls out “get_header(‘home’)”, I’m guessing I can just rename home with the file name “header.php” without the quotes. Right?

4. Under the “else” I’m guessing I would put the custom header in the parenthesis inside ‘ ‘ … Like this… get_header(‘header-custom.php’); Right?

5. Where do I find the name “home” from is_home in the php files that come with the theme? Or is that from a setting in the WordPress back end?

6. Can I remove these lines safely?

elseif ( is_404() ) :
	get_header( '404' );

Sorry if this isn’t clear enough. Thanks in advance for any help.