Hi Yigit,
Thanks for the help! The solution you provided only has IMG 2/URL 2 launch in “target=_blank”, as opposed to IMG 1 and IMG 2. But no worries, I found an alternate workaround using HTML to place an image with link within a Text Widget. This allows for custom sizing, as well as being able to custom control targets for each specific image.
http://onecoolsitebloggingtips.com/2008/02/28/wordpress-placing-images-in-text-widgets/