Rolando,
First of all - GET IN ON THE FANTASY LEAGUE! WE NEED YOU!
Now - back to the subject at hand: Shaq doesn't face many low-post centers who look to score. Duncan fits the mold, and about half the time (if not more), it's a power forward covering him. Duncan is the only real low-post offensive-minded center - and he's also the focal point of the Spurs offense. Campbell, in contrast, isn't a focal point - although, by my strategy, he would be. Kobe and crew aren't going to be upset that they have to help Shaq handle Tim Duncan...but I can't think they'd be happy if they had to help him handle Elden Campbell.
Ben Wallace isn't an offensive threat, per se, which is why I'd use him and his mobility in pick-and-roll. And Okur has serious range. The idea is that you don't have a single player who can make Shaq take a look at the entire spectrum, the way a young Arvydas Sabonis might have, so you have to use multiple players if you want to do that. Detroit has the right personnel. The question remains whether they'll do it or not.
Joe