I can confirm that this does work. :warr
I did it differently. I already had a working Build 13 install, so I copied it and then added Build 14 beta 1. The water was good. Then added patch 6. The water is still good. I only played for a couple of hours, then did some house cleaning. No need for 7 POTC installs. Deleted some and then defragged. All night......
I have always started with a clean original POTC before and then added Build 14 beta 1.
I didn't do 7 POTC installs. After cleaning out those files I talked about earlier, I installed the stock game, Build 13, Build 14 Beta 1, and then Patch 6 full.