[Plugin: Photospace Gallery] hover on thumb loads main image

Loaded photospace plugin – works great with a few manual tweaks but the only thing I cannot sus is:
clicking thumbnails loads the main image fine – how can I set this to mouseover or hover?

In other words, I want to load the main image by hovering on the thumbs instead of clicking. Possible?

http://wordpress.org/extend/plugins/photospace/