How can it fight the war, or how can it win?
It's doing a bang-up job fighting at the moment. It just still lacks a tactic or strategy that could result in any kind of stalemate/truce/draw, short of global catastrophe destroying the Internet.
There are no fundamental differences between print and music in terms of how the businesses are run. The markets are going more digital, more direct, and at times with fewer middlemen. That the analog forms of both are made largely irrelevant for the average consumer seems inevitable, though that's over a much longer term for printed materials than most technophiles would prefer.
How can Printing Press fight the war against Digital Publishing and E-books?