The prerequisite for starting the pitt DLC is to find pitt slave clothes.
I already freed the slaves in question and looted the body in the slave pens long before I I tried to start the pitt DLC. This means that simply getting clothes from the area by the objective marker is not an option.
Is there any in game or other cheating solution to acquire appropriate clothes to start this DLC or to enter it anyway? Are there detailed enough save editing application out there?
I am playing on xbox 360 (yes I know that was a poor choice).