Well you can turn it on by modding the options files but it doesn't work right...it causes various crashes.
What I did now to get it to appear was that I downloaded the BmLauncher file from the demo of Batman AA and just swapped it with the full game's BmLauncher file and it finally appeared in the options..but i don't have any time to test it to see if it actually works.
[Edited by SideFX, 9/3/2009 9:06:15 PM]