Specific WAC commands

Could somebody please shine a light on certain WAC commands and how to use them?

I’m having issues with some of them, both in single player and coop tests:

1).Playerfired(#) ; this doesn’t seem to work in both map types, and yet it is mentioned in the list of available commands. Does anyone have any positive experiences/results they would like to share/clarify?
2).SsnSeesSsn; tried both in single player and coop, and could not get it work, both through WAC and Med.

3).SsnTargetSsn;

4).Brief question about mortars: in previous Delta Force games, the mortars could only be used in single player, or only be heard/seen by hosts. Was that problem solved in AW2 or does it still work that way?

Thank you all for your help.