I have also been looking into this, i can make it so that it never spawns (ever) by NOPing some values linked to its movement in the EXE, but i don't know how to get it so that it spawns once then doesn't again after you kill it.
I have also found some other interesting values, like 1 value that allows it to leave the sand area (although it doesn't detect where you are unless you are in the sand area) and another value that makes it go around in circles, and 1 value that makes it follow vehicles like the highwind etc.