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You don't need a rank, you get the ghillie suit when you use a certain class/perks
SAD.
by getting head shots and kills
68
Its how you rank up in the game.
Hacking or killing
You cant delete rank in CoD:4. The only way to start from rank 1 is to delete your profile from the Select Profile menu.
Get to rank 70
You play the game online and rank up to open it.
no
Go to player card. Click edit player card. Then you customize your own. If you don't do this, it will just display your rank.
Yes, ranking up only relates to xbox live and xbox live games, matches, and stats in Call Of Duty 4