Here you go. I used this for my 500 pound trophy. Just change the location to wherever you want to adventure, and the weight limit is how heavy you want each familiar to be (I had enough that they only needed to be at 8 pounds each). The extra_execute command is for something to be done for each familiar (for me, i wanted to equip the familiar doppelganger), change that to a blank string (""), if you don't have anything. Then just run the script.