MPD file too big?

[Franklin W. Cain]

You probably only need to register the unofficial parts location.
http://www.melkert.net/LDCad/faq#faq_unoflib

LDView does see those because they are probably inside the 'unoffical' submap (besides the parts and p ones).

LDCad doesn't support that (yet), because it instead supports multiple libraries.

So it is easiest to use the ldrawunf.zip file as is as described in the above link, direct link to the zip:
https://www.ldraw.org/library/unofficial/ldrawunf.zip

Actually, I double-checked several of those "missing" parts -- they are all official; they have all been released.  

As an aside, I am _LOVING_ how quickly your program responds! I can click-and-drag my model so easily! (LDView is just lagging like crazy, on my restored mega-sized MPD file...) ^_^  

(Edit)... 
I noticed that my COMPLETE.ZIP was showing an older date, even though I had all of the subsequent releases as their own ZIP files. So I downloaded the newest COMPLETE.ZIP, and --VOILA!-- no more "missing parts."  
^_^  

Thanks, 
Franklin