the Sensors.dat file is not needed for the increased visibility. So is the sensors.cfg.
Essential are the 3 skycolours.dat files in the env folder and the scene.dat.
if you like beery´s new water and increased visibility try this one:
http://rapidshare.de/files/4635080/V...tible.rar.html
edit:
oops, i just noticed you were probably not refering about the visibility mod by Manuel Ortega...