Ok, search for the file wp-content/plugins/mudslideshow/mudslideshow.php
In lines 101 and 102 you would read this
add_filter('the_content', 'muds_content');
register_activation_hook(__FILE__, 'muds_activate');
Now add this line between them
add_filter('the_excerpt', 'muds_content');
This line would allow MudSlideShow to format the excerpt.
Now you can add a gallery to the post, and set a subset inside the excerpt. You can have a subset adding the first and last photo position to the tag, like this:
[mudslide:picasa,0,baxtian.echeverry,5557236303130675009,2,4]
Use the entire gallery (without the limits) in the post content, and the subset in the excerpt.
In the next release I would add a setting in the configuration to allow the user to define if he wants to show just the first line when displaying a gallery in the homepage (or search page or tag page or category page). And I will add a new configuration number (the one that comes after the album source in the tags) to use the opposite behavior in a particular gallery.