There's a Rolling Stock heading about a third of the way down the page with a link to the KVVR pack.
I must comment that it's wonderful to be able to download a route where its creator has taken the trouble to provide links to where all assets and dependences can be found.
Big Valley is the perfect route for me as I find huge yards, 100 car freight trains and multiple diesel lashups far too intimidating. Local lines and branchlines are far more fun.