At the start of any level type skip mission i don't know if you are supposed to have a space between skip and mission.

NOTE! you have to hold down the left "shift" and both "minus" buttons in three seconds before you can type the code.

Unlimited ammo ,and weapons
Durring game play "Alt+ ~"to exit to windows, go to your "Operationflashpoint/users/username/saved/temp"directory then open 1985.sqc file
with note pad, in there is where your progress in the campaign is kept.
look for you campaign title and the find this entry--

side="WEST";
idGroup=1.000000;
id=1.000000;
take note of the "idgroup" value
and the "id" value.

now goto OperationFlashpointUsersusernameSavedcampaigns1985
open weapons.cfg file using note pad
look for "david armstong" and edit his "idgroup" and "id" values acording to 1985.sqc values

whille your there you can crank up anybodys weapons,including your own or exchange weapons.
BE SURE TO BACK UP ANYTHING BEFORE YOU EDIT.
save the changes you made and return to your game and restart the currnt campaign
if you did it right it will work flawlessly.
the same can be done with "red hammer"