Complete lights

I have an 05 magnum and it started about a month
ago that my interior and exterior lights flickering.
Now I changed out the altenoter and battery it was
about 1 day fine now it actually got worster. So I
called dodge and ask couple of question. Like if I
can solve the problem by putting in an voltage
regulator since dodge is known for that problem he
hung up on me. From does forums i see I'm not the
only one with this problem. Does it really helps to
get the ecu computer re-flashed? That's my
question please need some answers before I going
to spent more money on parts for no need to
change.