The gallery is created using a WordPress gallery.
1. The first thing you need to do is customize the size of your gallery thumbnails. To do this click Settings > Media in wp-admin, and change the default thumbnail size to 202x202px
2. Next you need to upload some images to be used in the gallery. While editing your page, click the « add images » icon, and upload a the collection of images you would like to display. Next click the « gallery » link, and add the WordPres gallery that you would like to display. Make sure you choose « 2 columns » and set the « Link thumbnails to: » to « Image file. » Add the gallery to your page. Once added, BusinessCard will automatically convert it into a jQuery slider.
http://www.elegantthemes.com/gallery/businesscard/readme.html