[Twenty eleven] How to add excerpts and thumbnails

As a title i want to add excerpts and thumbnails (the feature image i use on the article) to the twenty eleven main page (not only for the search feature).

Before the last 2.0 update i was using this script that work at 100%:

In functions.php add:

// This sets the dimensions for the thumbnails displayed on the homepage
	add_image_size('excerpt-thumbnail', 140, 140, true);

In content.php find

<?php if ( is_search() ) : // Only display Excerpts for Search ?>
        <div class="entry-summary">
        <?php the_excerpt(); ?>

andreplace with:

<?php if ( is_search() | is_home() ) : // Edit this to show excerpts in other areas of the theme?>
<div class="entry-summary">
<!-- This adds the post thumbnail/featured image -->
<div class="excerpt-thumb"><a href="<?php the_permalink(); ?>" title="<?php printf( esc_attr__( 'Permalink to %s', 'twentyeleven' ), the_title_attribute( 'echo=0' ) ); ?>" rel="bookmark">
<?php the_post_thumbnail('excerpt-thumbnail', 'class=alignleft'); ?></a></div>
<?php the_excerpt(); ?>

In style.css add to

.entry-summary {
		padding: 1.625em 0 0;

this line:
ext-align: justify;

Because the content.php changed with the last update i’m not able anymore to replace the code above.

Someone can help me to fix the issue?
thanks.