Yeap... but it also disables the player's control of the mouse
In the past I tried to use the map as a background to a dialog, for a platoon control script.
I found that commands like mapclick simply didn't work, as OFP didn't detect the map was displayed...
Sure, it was on the screen and you couldn't see anything else, but other than that it still behaved as if the player was moving and shooting as per usual...
Having said that, that doesn't necessarily mean it can't be done. Just that I don't know how to do it