Try this
Go to the following file
blogs ->inc->widgets->widgets->_coll_post_list.widget.php

at around line no 77 you will find...

'limit' => array(
					'label' => T_( 'Display' ),
					'note' => T_( 'Max items to display.' ),
					'size' => 4,
					'defaultvalue' => 20,
				),

Change => 20 to the number you want

I'm trying to add the links to the last X amount of posts on my sidebar. Will this do the trick and how do I call it?

Example of the last 20 Recent Posts
http://wow-factor.com/index.php#info

While thats in my footer, all you have to do is go to your "widgets" tab, find the Sidebar grouping and click on ADD Widget.
That will take you to your list of widgets, simply add Post List to it

Thanks, that'll do the trick!