I will answer one of your questions, and I'm sure others will tackle the rest.

A good tool to use is a downloadable flight planner available at the Cathay Pacific website (www.cathaypacific.com). It is basically a subset of the OAG that you can configure to show only oneworld carrier flights worldwide). The only warning is that you need to pay careful attention to codeshare flights that are displayed by the flight planner, since only codeshares operated by other oneworld carriers are eligible.