From where can he locate other suits and pack him?

This one is featured in many Iron Man Movies, where this move occuirs on such scientific fights where he sacrefices himself from heroic aspect to save the rest of the people there, Many marks  of the suits featured in common plots in the moves are showing such realistic developments and futuristic control over it graphically, On some point, all he does to pack himself is just from the palm of the hand....

That one could be performed secretly without having to be transported back into the underground bunker to obtain all the suits he needs and then get back on the place to fight them

This involves
 * Programming futoristic commands
 * Listening Graphically onto the human brains fictionally