How to put multiple modules in one course

Just put them in separate Assignable Units. May have a bit of trouble with your LMS. Each one is differrent.

See my response to this thread:

http://lectora.com/forum/showthread.php?t=22869

In addition to the folder set up, you would need a retained variable(s) that would prevent the user from accessing folders (modules) out of order. Again, you're not really opening new courses (AUs) per se, just accessing other content.