Hi :)
Let me help with one at a time. Pick one you want to install, with its name, and I'll give you the path. :)
Main neighborhoods you want to add to play-
Documents\EA Games\The Sims™ 2 Ultimate Collection\Neighborhoods
If you're adding or editing the subhoods............
Business district subhood
C:\Program Files (x86)\Origin Games\The Sims 2 Ultimate Collection\Best of Business\EP3\TSData\Res\NeighborhoodTemplate
Bon Voyage subhoods path
C:\Program Files (x86)\Origin Games\The Sims 2 Ultimate Collection\Bon Voyage\TSData\Res\NeighborhoodTemplate
Downtown Subhood
C:\Program Files (x86)\Origin Games\The Sims 2 Ultimate Collection\Double Deluxe\EP2\TSData\Res\NeighborhoodTemplate
University Subhoods
C:\Program Files (x86)\Origin Games\The Sims 2 Ultimate Collection\University Life\EP1\TSData\Res\NeighborhoodTemplate
(don't forget to backup your originals)
