Originally Posted by Shinobi273
Did you both get the DLC? The disable option is linked to the DLC.
To be totally honest I don't remember if/when I downloaded it whether it was after the first run-through on normal or sometime during the Brass Balls run.
When I brought the game over to my friend the first thing he did while I was there was download the plasmid download and went and bought 1 plasmid (he was 1 shy for the achievement). A couple hours later it was actually his ROOMMATE that started the brass achievement and DIDN'T dl the DLC and HE was the one that couldn't access the Disable Vita-Chambers option.
So there. I guess.