I think I finally killed the machine with Sims 1 on it!
Yes, your old houses should bring all your favorite hacks with them, as well as the residents. Install Clean Installer from MTS. Then you just download the house, unzip it, and double click the resulting .sims2pack file. When Clean Installer fires up, uncheck any custom content you don't want and any Sims that
don't live there.
I may have copies of any hacks that aren't currently available. I even wrote a dorky little hack called Comfy Coffins which will give vampires more comfort and energy when they sleep in their coffins!
There's also a fairly large hack list on my site:
http://www.woodensimolean.com/RecommendedHacks
Don't forget to read the No More Ugly Maxis-Made Sims and other tutorials. Lemme get you the link to an awesome set of face templates that don't overwrite the Maxis ones, so you don't have to pick and choose as much....