The iliad_refresh.conf is a plain-text configuration file for the hacked libX11.so
It has only one line of text (and a new-line), containing a word ("Full" or "Typing") and a number.
The word indicates the type of refresh:
Full - refresh witn a screen flash, very little ghosting.
Typing - refresh stealthly, a lot of ghosting
The number is the timeout in milliseconds to wait for more changes to the screen before doing th refresh. The lower it is, faster refreshes but you can get "double-refreshes" (it refresh the screen a number of times one after another).