How do you get vampires and plant sims on sims 2?

Vampires:

Expansion Pack Needed: Nightlife

To do: go around the downtown area until you meet a count or a countess. They are vampires of course, and they look like classic vampires. Befriend one, and when you get a high enough relationship, they will bite you, and turn you into one. Beware, though, as they are no longer normal sims.

Plantsims:

Expansion pack needed: Seasons

To do: have a sim get a gold talent badge for gardening. Then, when the trees need spraying with pesticides do so. If you do it enough, you sims will turn plant.