I believe the very top link, the 'self-extractor' will get the job done. There are other scenarios for the game in the Scenario section on the site.
Take a look at this link as well to update the game using the latest SB: Pacific War game engine.
I don't play AAW much, but I know others here do. They might be more helpful in making sure that it gets done correctly. If the self-extractor does, indeed, work, I'll delete other other files just so things are a bit less confusing. If I had the ability, I'd do an update to the self-extractor to include all the latest scenarios. Perhaps this could be a job for someone here with those types of skills....