is there any way to get hold of the bitangent calculators unreal uses? apparently x-normal is too different to unreal for there to be any kind of seamless solution.
Just a heads up. It appears Mastering Unreal Technology, Volume I: Introduction to Level Design with Unreal Engine 3 is now in stock at Amazon. I just ordered a copy and should be here on Tuesday :) .
If you are in the default UnrealED, you can script the change in the used PPE per game using Kismet I believe, per moment. I would recommend doing it this way in the retail UnrealED as the PPE's are tied to everything in the game and will break the install.