Is there any addon - I"m not referring to FSRecorder or the likes - that is like a virtual "blackbox" for Flight Simulator 2004/X ? Basically if a flight crashes then we can go find the blackbox and recover and recreate it using the data it recorded for the last 30 minutes? Maybe it can record "cockpit" voice for those of us that have a mic?

There are tools like FSAcars and kAcars that log certain aspects of the flight. Some addons also have a really comprehensive DFDR (Digital Flight Data Recorder), like the excellent LSH Maddog MD80