Before logging in press ~ to bring up the console and type "open" then the map name for example: JRTC_Farm.aao then press enter then when the map loads type "Playerlock 0". A list of the maps is available in the Army Operations folder under Maps. After this you can enter cheats and create dumbies to fight, using the console.

in the console type the following codes:

Code: Effect

mpcheat ghost: fly mode
mpcheat god: god mode
mpcheat changeclass *: gun

in place of * type one of the following

ak
ar
g
gp
s
s24
ak74su
svd
r
rpk
m4
m4a1

Note: these cheats do not work on official servers in multyplayer mode.