If you are diving into the PS3 multiplayer or Zombies via a PKG install, these are the top-tier items to focus on: Top-Tier Selection Der Eisendrache (DLC)
Details for the PlayStation 3 and Xbox 360 Versions of Call of Duty
Considered one of the best maps for high rounds and gameplay variety. VMP / Man-O-War
The PS3 version was developed by Beenox and Mercenary Technology, focusing on the core multiplayer experience due to hardware constraints.