1. Setup headless client as you would in Arma2OA beta build 1.63 Beta
2. Add forceHeadlessClient=1; to Class Item# using a text editor such as notepad++
init="this allowdamage false; this setCaptive true;";
(a) At any mission save in editor; forceHeadlessClient=1; is deleted from the class Item# rendering var useless
(b) If the mission is compiled into a pbo in such a way that the editor cannot strip forceHeadlessClient=1; (such as modifying mission.sqm, saving in notepad++, then compiling with a pbo utility) AND forceHeadlessClient=1; is present during a search of the compiled pbo to verify existence; upon loading mission with Dedicated Client present, Dedicated Client is not moved to playerslot flagged with forceHeadlessClient=1;.