Old saves aren't compatible with the new version, there are too much changes in the code, so you have to start again from the beginning (but the integrated cheat menu helps to do this fast...)
I think that's advertising the card game, I forget if there are other steps to it but you definitely have to beat Hermione at the game, maybe a couple times, to unlock it.
no sex with a. you train her on spells and after she has learned then use spell on susan.
search is your friend.
If you need screenshots so much, take screenshots using "print scrn" (On any computer, you can take a screen shot of anything and anytime).
