Go to your list of sidebars page and create the shortcode as shown on screenshot 2 here http://ww.wp.xz.cn/extend/plugins/widgetize-pages-light/screenshots/
Then if you want to insert the sidebar in the page content editor just pages the shortcode there. If you want to insert it in a template file of your theme use the do_shortcode WordPress function http://codex.ww.wp.xz.cn/Function_Reference/do_shortcode
Examples:
[otw_is sidebar=otw-sidebar-1]
<?php echo do_shortcode(‘[otw_is sidebar=otw-sidebar-1]’); ?>
I hope this helps 🙂
OTWthemes