Quite simple really. All you have to do is buy a coffin from buy mode and make sure its not exposed to daylight. And then just do what you would do with a normal sim! :)
Chat with our AI personalities
no, you can only become a vampire if you have the sims 2 Nightlife for the PC
Yes, a vampire can marry.
no.
Make sure you have at least 2 sims in a lot and when you see a vampire, make both sims friends with it and choose the one who won't be a vampire and click on the vampire with influence to... bite neck then the vampire will bite their neck and they'll become a vampire! Need COFFIN be in by 7am - 7pm or you'll burn in the sun!
Vamprocillin d cures vapmirism if you have become a vampire in Sims 2.