> drop-down list of all the players
Well you could try to read the dialog class and hope to get the string with all the names.
> pass more parameters to the mission
Interesting idea. You need to test if GV will survive from the MP lobby to the real game though.
Alternatively you could mod the MP briefing to read stuff and offer a modified UI to customize settings
in that phase. One problem is to make it only available to a specific person.
Probably slot based (check for unit name), or a static list of real names would work well.
I think to detect an admin (voted or logged), is still not possible, is it?