Upload a career save (a .CAR file from your SWOS folder) to edit your bank balance, club, manager, kits and your full squad — including the reserve and trial players the game hides. Change names, nationalities, shirt numbers, positions, hair, skills, base values and form, then download the modified file and replace the original. The game computes each player's in-game price from his skills, position and form — so to raise a price, raise the skills or the form. Everything else in the save stays untouched.