The custom CAS! mod overrides the original Maxis CAS file. This particular mod has the warm brick walls, wooden floor, furniture, candles, sconces and "rugs" using one carpet color from only the base game (original Sims 2) with a view of the "backyard" full of trees and a large pond. No custom content was used with this one.
You will want to grab Windkeeper's CAS mods from
here and install them in your Downloads folder:
CASinvisibleobjects - Family part
CASinvisibleobjects - no mirror
CASinvisibleroundpodium
Install the CAS! mod in the following location:
C:\Documents and Settings\**UserName**\My Documents\EA Games\The Sims 2\Downloads\Custom_CAS_Screens *Or a differently named folder*
Tested with Apartment Life and should be backwards compatible with previous EPs.