If you have already installed your lot in your game (preferably using the Sims2 Clean installer), you have the lot listed in "lot catalog" as the last you had installed.
What I do is go into the game, and bulldoze the lot. Then I remove it from the lot bin.
That should remove any traces of the lot from your game.
I've done this many times, and it hasn't hurt the game..but I do wish more house creators would list every single EP and SP they used to make the lot, because often they do not, and it crashes my game even if I do use the Clean Installer.
Thanks. That helped me tons!!:snorting: