Tutorial - how to build basement apartment ?

[PlayLives]

Does anyone know of a tutorial for building a basement apartment, a basment with stairs leading to it from the outside like a separate entrance?

thanks

[Jelenedra]

Google search brought up this:

http://www.simprograms.com/tutorials_sims2_houses.jsp

[eve_ftw]

http://mikeinside.modthesims2.com/index.html#sims2

[PlayLives]

This is what I was looking for...
http://forums.modthesims2.com/showthread.php?t=73306&c=1

(just in case someone else wants a tutorial)