Try this it might help.
Go into your The Sims 2 Folder. I access mine by going into my documents>ea games>the sims 2.
There are a few lose files they are labeled
cigen and groups.cache.
Try deleting them. Restart your game and it should be ready to play.
My game hangs sometimes as well when I introduce new items that mess with the normal loading of the game like hacks and other modded custom content. I would also attempt what Caffeinated.joy suggested to be on the safe side. Good luck.