Save File for all Portal, All barns, All Positions but not any trait levels or any other cheats. No wild Nephs in barns, all just a brand new game.
If you want to use your own Avatar/Character, start a new game, make your avatar how you want then BEFORE you click next, save it and it asks you if you want to save as a preset. Do that and name it what you want.
Then load my game, click on the house, edit character, top row, 2nd along is load preset, click on your preset and you now are playing with your saved character. Save game, and your good to go.