Help please with Sims and Expansions?

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)