I would like to have a  second image container added (as preview) in the galleriffic plugin, which should be showed on hovering the thumbnails.

Can somebody tell me how code should be extended or where to beginn to achieve this functionality?

It should then look like -->  here, off course with the hole functionality of galleriffic. 

Any help very appreciated, thanks in advance!

The code is --> here, could not post it because too long.