Twenty Ten Theme

Recommended slideshow size:

Width: 940

Height: 300

Steps:

Go to Appearance -> Editor. Select header.php from the right.

Find (line 85):

elseif ( get_header_image() ) :

Replace with:

 
    elseif (is_home() || is_front_page()) : echo do_shortcode(""); // replace 1 with your slideshow ID
    elseif ( get_header_image() ) :

Save.

Only for coin slider:

Go to Appearance -> Editor. Select ‘style.css’ from the right (it’s probably already selected).

Add to bottom:

.coin-slider {
    clear: both;
}

Save.