[Help Wordpress] Custom slider

Hi!

Your plugin is great, and I've had lots of uses for it. But I can't seem to figure out how to add a custom slider which is suppose to use the same stream of images that one of my RSS feeds manage to do (http://hasitleaked.com/feed/?orderby=leak_date&order=DESC).

So I went to: http://help.dimsemenov.com/kb/wordpress-royalslider-advanced/wp-mod...
And figured out I need to modify and do like this:

$args['orderby'] = 'leak_date&order=DESC';

I tried inserting this (and the rest of the code supplied at the URL mentioned) to functions.php but it doesn't work. PLUS I don't necessarily want this query to run on each page when I only want to use this custom slider on my front page.

Could you help me out? Thanks!

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help.dimsemenov.com