Trying to combine multiple large CPT files but it keeps crashing. Any advice?

Hi everyone. My team and I used Captivate 12.3 to build a course. We didn't know there were a million versions of Captivate that were good for different things. We just used the default program on the site. We used it because we need to convert the files to an elearning option via SCORM. It has taken a month or 18 hour days to build this thing.  

I now have 10 separate cpt files. Originally I thought maybe I could branch each CPT Together somehow, but because we are selling the course itself, and wont be managing it, we need to combine it all into one file. Each module is about 10GB (roughly). Lots of video.

When I copy and paste one class into another, it keeps crashing. That's after just trying to merge module 1 and 2. We have ten. We can't rebuild the whole thing from scratch. What can we do? Any ideas?