Where's my Arma2 missions?

[nominesine]

Decided to dePbo some Arma2 missions and opened up the mission folder, only to find it... empty 

Where are the mission files for the campaign and all the single player missions that comes with Arma2 stored?

NOTE: I have my Vista set to "Show hidden files", so that is not the problem.

EDIT: Apparently parts of them are stored in the addons folder nowadays. Things change... 

EDIT2: But most of the sound files seems to be inside the core files of the game. Even mission specific voice overs. This might mean that they are accessible, as in OFP... (Vodka, Devils Dogs, Run Away,  etc).

[foxcom]

deactivate read only on the folders then you see the missions

[nominesine]

I found them by now. But thanks for the heads up