Hi ! im having a weird problem when installing 'happy holiday stuff' stuff pack. it completes the istallation , like it's supposed to , and says the stuff pack is installed. but when i run the game its not istalled. this is very annoying when downloading custom houses, cause it wont let install them and just says: you dont have all the reguired expansions istalled.

im not sure have there been any thread about this, i just could'nt find any. and sorry about my bad english.

You've cleared caches?
Tried uninstalling and reinstalling the Stuff Pack? with a registry and folder cleanup before the reinstall step?
Can't recall if there's a patch for this SP...?

Which shortcut are you using to start the game?