Check your zCEP_Extra folder in Documents/ EA Games/ The Sims 2. There may be something in there causing issues.
Oookay, not sure what I'm looking for but I found these things that may be causing it:
Garden_Rocks (Can't remember where they are. Could have sworn they were in terrain but who knows. As I said: me no use deco)
Atomic_Age_Lamps (In lighting? Or maybe they're merely decorative)
Club_Table_Lamp (Erm, see above)
Fat_City_Counter (Have no clue what the hell this is. Supposebly it's a counter? Like, food counter? More than likely it is and I'm being really stupid)
Am I looking for some special package specifically in the decorations or a package in general? What do I do if it's crashing my game? Do I open it in SimpE?
Very N00by questions, I know, but then again in the land of the Sims I tread with boots of n00bles instead of awesome Maty boots.