Okay I think most of you would know how to do this but for hose of u who can't here is how

Zombies:
You will need: sims 2 university

okay first get the resscurit-o-numerator ( I no that's not wha to is calls but hopefully you get it) do this but unlocking it with the cheat UnlockCareerRewards (the U C and R must be caps) then kill a sim. (make sure there is a sims in the house hold to rescue it. Then Clio he icon of the sims face and drag it to the reesucurit-o- thingy and poof there ur zombie

Wearfolf:
you will need: Sims 2 Pets and also works on nighlife

okay this one is easy keep and eye out for a black dog wiu glowing yellow eyes that will come at ur front door make felriends with it and when u are heaps good friends it will bit u then ur a wearfolf

Vampire:
you will need: sims 2 nightlife

okay this is the same with wearfolf only this time you have to go to a community lot and make fiends and he will bit you then ur a vampire or you could us the cheat "boolprop testingcheatsenabld true" then right clik on the sim u want a camped then click make vampire but becareful you can not go out side as a vampire u will sizzel so be carful