cant find official missions to edit

[Archamedes]

I am trying to find the official missions and red harvest campaign, so i can unpbo and disect the missions to find out how certian triggers and scripts are done. but for some strange reason i cannot find them anywhere, not in the main arma 2 directory or my arma 2 profiles folder where are they located?

[Big_Daddy]

it's in the addons directory. missions.pbo

[Archamedes]

oh right found it. whats it doing in there?

[Big_Daddy]

uhmm. every part of the game is in there. every object, map, everything.