Light in the darkness

Hi everyone!
So, I post here randomly when I feel I need to let off some steam after my mother's bad episodes. I always used to think "is it me?" Well, most definitely- IT'S NOT ME! And I could tell a very long story about how I came to my conclusion that it is highly probable that my mother has Paranoid Personality Disorder, but I'll spare you. Too much detail. But my point here is: I FOUND HOPE!
Now normally, I'm the type of person who doesn't like labels. Not everyone fits into neat little boxes. However, after all of the stuff I've been through with my mom, waking up from my programming, talking to family, and doing research, yes, the label of PPD helps me to cope with my mother's behavior and can help me reasonably predict how she will react and how I can manage myself (or her) to minimize the emotional damage. It's like a light has turned on and now all those sharp corners I was bumping into with my mother are all revealed.
When I go to visit my mom, I know first off- she doesn't handle close relationships well...it's better for the both of us if I treat her more like a familiar acquaintance. Secondly, don't take some of what she says seriously- nobody is out to get her, I don't need to keep any secrets, and nobody's filling my head. Third, it's always best to take "outsiders" along to keep my mother in check like my husband, or a friend, or my grandmother. Mom seems to think she has to hide everything she says, so when I have an "outsider" (like grandma!!- really?! yeah, really!) along with me, she doesn't target me. Fourth, I can turn it into a bit of a game, keep score of how many times mom says how her family is out to get her, or makes me promise to keep everyday information a secret...etc.
So, I wanted to know a couple of things: 1. does anyone else have a loved one who suffers from PPD? and 2. have you found hope in getting some sort of label on your loved one's issues (it doesn't necessarily have to be PPD)?