All Weapons
     Hit the tilde (~) key, and type out "mpcheat changeclass #" (sans
the quotes) where # is any of the following:

R                       M16A2 
AR                      SAW 
G                       M16A2 (w/ Grenade Launcher) 
S                       M81 (Sniper) 
AK                      AK47 
S24                     M24 (Sniper) 
F                       Fists 
M4A1                    M4A1 
AK74SU                  AK74SU 
GP                      AK47 (w/ Grenade Launcher) 
RPK                     OpFor Machine Gun 
SVD                     Dragonov Sniper Rifle 

Mark All Courses Completed
     Browse  to  your game directory and open the file yourname.txt in
the \System\Save folder. Replace your line with this:

511,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,
15,15,15,15,15,15,15,15,15,15,0,

     Note:  May not work after submitting results to an online server.
Always make a backup before overwriting files.