all right this is what I found about ranks:
Ranking Up
Outside of the clans there is a new individual ranking system as well. Starting out, new players will be placed into the unlisted ranks. Moving up within the unlisted ranks will be done simply by playing games, win or lose. These are just about getting new players used to the game. Of course, to move on to the officer ranks players will have to get some mastery of the game and win a few battles. That's when the ranking system truly begins.
Once in the officer ranks, players can rise up the list by winning battles in scored games. These games have set requirements and will be fairly standard matches. The difference here is that there will also be two other sections that people can play in that will not be recorded in the stats. These are the open games that have the different maps and game types as well as the respawn games with players coming back to life as soon as they die.
With the open and respawn sections, players can have the ability to hone their skills and try out different weapons or strategies without leaving a mark on their permanent record. The open games allow practice on the different game types and maps while the respawn games allow for players to fine tune their basic skills of moving, shooting, and driving vehicles within the game without being knocked out of the action and waiting for the games to start over again. While it's likely that these sections won't have the bragging rights or as fierce a competition as in the ranked games, but it all helps towards making better players all around.
from:
http://ps2.ign.com/articles/610/610218p3.html
Linear Mode
