This module lets you set the NeXTStep Windowserver gamma correction factor. Basically, it just plays Mr. Nice GUI for the included command line program setlut, which has to be in /usr/local/bin with root ownership and setuid execution enabled (in other words, from the command line type chmod 04755 setlut and perhaps also chown root setlut).
The gamma value is stored for each user using a dwrite.
There are some restrictions:
a) it only works for machines running in 24 bit colour mode
b) it only works on Intel hardware
c) the user's personal gamma value is not restored upon login; you have to activate Preferences.app to get it.
