Have you tried the Gallery Unlocker mod? I don't use such things myself, but they tend to be popular for situations such as this
if I can I prefer only have the walkthrough is they are something I can do, in this case I miss only this events...
for caitlin I miss the scenes "down there", "between dem titties" and "alchemical mishap"
for the misc one I miss only the "poolside cheer"
since I miss only this then I have no problem with just the walkthrough but if I have to redo the game from the beginning then no thanks and I don't trust those unlocker mod