Well, we do have a sticky letting you know you download and install the Insimenator under your own discretion, as the mod is no longer being supported and updated. We only provide it here as a courtesy to those who still wish to use it. If you do use it, and it does break your game, the best advice we can and will give you is to take it out and hope you have a recent back up of your game.
Please read
this to find links to where you can find a "How To" for the Insim mod.
Also, moved to Sims 2 Help as this is a help question.
ETA: Edited to add the link. Oops.