Gallery instead of slider

The default slider you can disable by adding this code to your theme functions.php file

add_action( "init", "change_slider_to_gallery", 1000 );
function change_slider_to_gallery() {
    remove_action('adverts_tpl_single_top', 'adverts_single_rslides');
    add_action('adverts_tpl_single_top', 'my_slider');
}

function my_slider( $post_id ) {
    // your gallery code goes here
    // for the best results check how gallery images are being loaded
    // in default slider adverts_single_rslides() function which you
    // can find in wpadverts/includes/functions.php file 
}

Thanks Greg