When I enable boolProp and click "Spawn... Sim Modder", no baby doll shows up. I have tried to get Sim Modder working on three different lots, and it hasn't worked once. I've tried it with my custom content installed and uninstalled, so I don't think that any custom content is blocking it. After all this, I downloaded and installed a mod that contained the Sim Modder and made the doll a purchasable item in the Catalog, but it didn't work and the doll won't show up in the Catalog. The mod said it would only work with Nightlife installed, so that may be why the mod didn't work. Even so, I still can't see why my boolProp Sim Modder won't work.
I am running Sims 2 with University and Pets installed, on a Windows XP Home with 2 GB of RAM. I use the Pets disc to run my game.