replace backgrounds in Captivate 4

I have two projects. One has the backgrounds that I need; the other has the Captivate objects that I need (text captions, highlight boxes, and so forth). Does anyone know of a fast way to replace all backgrounds in one project with all corresponding backgrounds in another project? For example, replace background of slide 1 project 1 with background from slide 1 project 2; replace background of slide 2 project 1 background with background from slide 2 project 2; and so forth.

I've got a ton of slides to swap backgrounds on so if there is a fast way to do it, that would be a big time-saver!