Ok, I must be totally screwed then because I have no clue what you are talking about.  I have been looking through all sorts of files to find something akin to a lot descriptor entry, but I haven't that faintest idea if I am even on the right track.
How do I know which lot is the Broke household?  Talk to me like I am a two year old. 
You'd better upgrade yourself to at least a 6 if you want Pescado to help you.  However, you'd do even better to ask at MTS2.  We're not very good at hand-holding at MATY.  For instance, the lot descriptor was very easy to find: I opened a random package file in N004\Lots and found "House Descriptor" in the left-hand menu.  If you can't manage that much on your own, MATY technical help is probably out of your depth.  Good luck.