Those extra textures are completely separate from any of the interfaces, they're just loading screens that reflect the new map I made for PotC. They also change the framed maps on the walls of some interior locations like the shipyards and townhalls.
Let me stress that they are JUST textures, and there is no coding OR interface that they should interfere with.
If you're having trouble with your game, it may just be a corrupted install - if you do what Sirus suggests about doing a clean installation of PotC, then Build 11.0, the update, and then add the textures, and I think you should be fine.
The extra textures are purely cosmetic, and are NOT absolutely necessary, and they should not interfere with the running of the game.
HTH! And welcome aboard, Gozer! <img src="http://www.piratesahoy.com/forum/style_emoticons/<#EMO_DIR#>/hi.gif" style="vertical-align:middle" emoid=":gday" border="0" alt="hi.gif" /> <img src="http://www.piratesahoy.com/forum/style_emoticons/<#EMO_DIR#>/icon_mrgreen1.gif" style="vertical-align:middle" emoid="

" border="0" alt="icon_mrgreen1.gif" />