"If you want to walk a mile in someone else's shoes go get the swap package and swap shoes, but if you want to walk in their legs or body in general go with our possession package. The main act is simple, just select a target and you will possess them. The specifics will determine how exactly the possession will work, but in general you will be in complete control of the person selected."
Jeff looked at the code and there were many specifics. Whether or not his body would not exist in this reality, disappear, there be some representation of his personality piloting his body... Whether or not the person being possessed would be conscious, Whether or not you can get hints about how the person would generally act, Whether or not you can jump to other people or... However it seemed that Jeff would be in complete control. He could allow the target to act freely, try to resist him, or he could even change the target in anyway he wanted... Within the chronivac's powers obviously.