Career more than 15 seasons?

[Vladimir Shkrobtak]

I know that in FIFA 20 you can use a cheat table to change a manager's career length, but can it be done in FIFA 14? Perhaps by changing the addresses in the table or something else. I would be very grateful for a description.
15 seasons is very short if you play for example with 5 leagues with promotion and relegation, at best it takes 4-7 seasons to get to the top division.