on the description of 7.0 version on the website I found this....
Number of memory dialogues that can be unlocked, depending of the villager you are working with:
Ghart: 4, Giant Loyd: 4, Grant: 1, Gregor: 4, Hanth: 5, Horace: 4, Hubert: 3, Orderic: 4, the Twins: 4, Valdo: 3, Zack: 4