Hi Ron, lol, you're name is very familiar, I just answered you on another forum as well. My name is a little different, but still contains "Ryd" in it. You'll get a more adult audience here.
I've answered you on both forums.
Sometimes the triggers surely don't make sense, like calling Prudence. To trigger Nancy to be able to call Prudence, make sure you read the magazine in Joanna's room on the table, there's an article about Prudence. And look closely at the plaques beside her door leading in, there will be a name plate for her organiztion.
Also before you can call Prudence you'll have to find some of the other keys first, I'm not sure why, but it seems you have to uncover them in sequence (no pattern to the sequence unravelled, besides talking to other gamers). Look at Henrik's disc again and pay special attention to the Notes icon. If you haven't looked for the "West" key, now's the time to do it.