One other small detail, which I'll add to the last post in a moment, is that the Lakers usually had Bynum sag off on the pick and roll when Rashard Lewis was at the 4, but they would switch Pau on Howard when Battie was at the 4.
Going back to crzy's post about switching on screens, it only really works when you have 2 guys that have similar size & skill sets. While Gasol & Bynum are the same size, Gasol's considerably quicker. Therefore, if you switch when Lewis is at the 4, it means that Gasol's guarding D12...but Bynum's on Lewis, and is probably gonna have to chase him around the perimeter. Yikes.
Bynum on Battie? No worries.