questions on some stuff in config.ini ....

[Pluto]

I got a phonecall from a friend when I was in a hurry and had no time for long conversation. He told me something about the Ubisoft logo that appears at the beginning when you start the game. He said that this was causing some graphical problems and if you rename it in the config.ini so it does not appear anymore, those problems are solved.
A second thing he told me was about the people on the ground, walking and in vehicles (groundcrew etc. ...), they can be made visible by activating a point in the config.ini that is called "activate humans" or something.

As I was in a hurry I had no time to discuss it with him, so here my question, does anyone of you know more about these things and can we really change it in the config.ini ?
Somewhere else I have read something about "not messing" with the config because that could corrupt patches or cause ban from servers or something in some way. Does anyone know more about that?