I was able to get the activity linking system to work with minimal effort, which is an accomplishment for a moodlenoob.  One issue, though:

I installed lesson_cdc (which works well by itself).  I cannot get a quiz to link to it.  You stated that  a "lesson" could link, but do I need to modify any code to get lesson_cdc to work in 1.4.3+ ?

Thanks for your help!

Brent