how do you make corporal so you can use the boot camp feature

Only one person can play online at a time.and lvl 7

When you get to level seven or eight, you are a corporal.
If you mean like a splitscreen mode, no it isn't possible. Only one person can use the console and TV at a time.

No "Coop" mode online exactly, but you can invite friends who also have Call Of Duty WaW to join your match.

As for becoming Corporal for Boot Camp... You should be able to access it until you are a Corporal (level 7 or 8?), at that point the game won't let you go back, because it's strictly for beginners.

You can never return to Boot Camp, even if you enter Prestige mode and become a Private.

Corparol is level 8 and only story or campain mode can do two player

I know a glitch. Go on to team deathmatch. On the righthand corner it will say match begining in 10,9,8... Wait until it says 3 hit Z,then up to leave party. Except hitting A to exit, hit A+B. You will thern return to the screen where it says to go into wifi. Go into it and you will have bootcamp unlocked. You can use this until you turn off the wii or exit the game. I tested this and it works.