How do you make your own apartments in Sims 2 Apartment Life?

To make apartments is just like making dorms in sims 2 university.

make a residential lot and build as you are building an apartment. Once you are done click CTRL+SHIFT+C and write it exactly like this.

changelotzoning apartmentbase then press enter and voila you have a custom made apartment.

EDIT: IMPROVEMENT:

This tutorial rocks.

http://thesims2.ea.com/getcoolstuff/apt_building_tutorial.pd