If you want the infiltrators to use the same uniforms as their enemy:
- Group the players to a leading unit of the "enemy's enemy" side and then delete that leader. Players are now enemies of their "own side". For example: Group Russian players with U.S leader and the players will be treated as U.S troops, though in Russian uniforms.
Or better in my opinion:
- Open up mission.sqm (in notepad, while NOT loaded in editor) and switch side on group and units by text.
BE VERY CAREFUL WITH THE SYNTAX. Then load the mission in the editor and see how the players are enemies of their "own side". Make sure to have written everything you need in the init field of the units before, because if you open up a units editing sheet and save it, the units model will switch to "default side model" and you'll have to redo the notepad process.
Then use setCaptive command true and false.