for one of the early options on the forum you'll see a "believe it or not, but...." option and if you click it, you can get him to respond in the forum. I dont know the exact option route for getting to pm him, but i did that AND mentioned the vampire-esque guy. I think i also chose another option that activated more cain responses, but in the end, you might have to play around with early options. it is a very option sensitive game, so just keep trying! its so worth it