Different Post Images

with featured image, which is implemented by the_post_thumbnail

https://markjaquith.wordpress.com/2009/12/23/new-in-wordpress-2-9-post-thumbnail-images/
https://justintadlock.com/archives/2009/11/16/everything-you-need-to-know-about-wordpress-2-9s-post-image-feature

Since I am using the 3.0 version and I don’t see that as an option do I just cut/paste the

add_theme_support( ‘post-thumbnails’ )

to the functions.php file and it should work?

thats how to get it started, for instance I have this in functions.php

// THIS IS THUMBNAIL SUPPORT
if ( function_exists( 'add_theme_support' ) ) { // Added in 2.9
	add_theme_support( 'post-thumbnails' );
	set_post_thumbnail_size( 50, 50, true ); // Normal post thumbnails
	add_image_size( 'single-post-thumbnail', 300, 999 ); // Permalink thumbnail size
         add_image_size( 'title-image', 50, 27 ); // Title mini photo
}

which registers 3 different thumbnail sizes I can use.

I then use the_post_thumbnail like this:
<?php the_post_thumbnail('single-post-thumbnail', array('class' => 'pageImage', 'alt' => 'Full Page Image')); ?>

to call to each of the registered images in my templates where I want them

OK, I am new to this so please stay with me as this is what I got:

I understand what you have in the first box except for the line:
add_image_size( ‘title-image’, 50, 27 ); // Title mini photo

What is a “Title Mini Photo”?

I don’t understand where to place the last set of code you provided.

I was reading the instructions that you have on this link. Can you use this on the 3.0 version?

https://markjaquith.wordpress.com/2009/12/23/new-in-wordpress-2-9-post-thumbnail-images/

This is an ideal link to visit to get all the know-how.

https://net.tutsplus.com/tutorials/wordpress/quick-tip-how-to-use-the-new-post-thumbnail-feature-in-wordpress-2-9/