Credo che il codice da modificare sia questo:
<script type="text/javascript">
stepcarousel.setup({
galleryid: 'mygallery', //id of carousel DIV
beltclass: 'belt', //class of inner "belt" DIV containing all the panel DIVs
panelclass: 'panel', //class of panel DIVs each holding content
autostep: {enable:true, moveby:1, pause:1000},
panelbehavior: {speed:350, wraparound:false, persist:true},
defaultbuttons: {enable: true, moveby: 1, leftnav: ['left.gif', -33, 110], rightnav: ['right.gif', 10, 110]},
statusvars: ['statusA', 'statusB', 'statusC'], //register 3 variables that contain current panel (start), current panel (last), and total panels
contenttype: ['inline'] //content setting ['inline'] or ['external', 'path_to_external_file']
})