I don't know if this was possible in XCOM EU, but if you set the skyranger = capacity to anything higher than 6, the additional soldiers will spawn in one spot together in a random area of the map. On some maps however (at least, the one where you start off on a rooftop under construction), the additional soldiers will spawn inside the skyranger and unable to move. Also they may spawn in the air out in the open, unable to move (but have line of sight to targets.) Just an fyi... :p