Anyway someone can help me out by having a Backpack Heap dispense backpacks with the addAction command?
Example: Walk up to a backpack heap and a bunch of Add Actions pop up with either "Get US Assault Pack" which in turns removes your current backpack (if any) and gives you a "US_Assault_Pack_EP1". With an option to get any backpack you want.
I've searched and found someone did something similar but I couldn't figure it out since it was heavily embedded in his mission and couldn't port it into mine.