Hehee... hopefolly you'll already know (I hope). That the Livin' large is an expantion that's came before the house party expansion...
So if that's correct the problem it's very funny if it's dose...
Okej I can also say that the Livin' large has reales a path and the original sims also.
If u want try to by livin' large and then install the house party. Maybe that should fix funny if that do
or try to download The sims 1.01 or 1.1 or what the f*cking name it is. If u install the Livin' large that path are included i don't think that path are included in Houseparty expansion.
I've installed the Sims then the Livin large and the sims path installed first then livin large.
And if u install the house party exp. the livin large patch are installing first then the house party. so try to unistall the house party and reinstall the sims and install the 1.01 or what the name is. and then house party. MAYBE tha'ts should solve the problem!