EDIT: I fixed the problem of the blank custom sets by adding a "Window" folder to the mod section and copying and pasting NPC, PlayerPhase, PlayerPsi, and PlayerTech .playerPictures files into the folder. They were not edited at all, just copied and... TADA. Fixed. However, the relationships page in the game is screwed up. It's entirely white. I can still move off of the page by selecting another tab at the top (I just have to click until I find it) and the game returns to normal. It's just this one page that screws up. Any ideas?
I don't know if anyone will see this post or not, but I downloaded a custom portrait pack and set up the mod folder exactly as was instructed and copied the large file and renamed it as a .dds. The portrait pack works with one slight problem... There are two blank portrait sets. I have looked at the file in gimp and it looks exactly like the original Sins file except with different pictures. I can't fathom why this is happening. The only files it came with are the button, large, small, and window .tga's so there is no .playerPicture file that could be changing the amount of allotted images. Does anyone have any ideas?