well, install them all in this order
1. The Sims
2. Livin' Large
3. House Party
4. Hot Date
5. Vacation
don't crack any of them, during the installations.
despite what i just said, after you've installed vacation, use a vaction fixed exe or no-cd crack on it, play the game with vacation.
(of course if they're 1:1 copies then you wont need to crack any of them)