potty training cats

Im thinking of getting a cat, an untrained cat,

so im wondering, how do you potty train a cat?
the reason i want an untrained cat is cause it will be awesome teaching it, it will be...worthwhile...:p

thanks in advance :)

umm like this?
http://www.karawynn.net/mishacat/photos/mtoiletside.jpg

or you meant like this
http://www.hartz.com/cats/ArticlePre...l=2&Article=71

I personally like the first one, and you can teach it how to flush =O