Solist

is it possible to change the gravity of a select object,

say i have a box collider and my player walks into the box collider, i want it to change the gravity on the player to 0 so that if they walk off a ledge or something else they wont fall.

this would pretty much be a floating state :P.

Kirb

There's a step called 'Change Gravity' that changes the Unity gravity value, which affects all rigidbody objects in game. If you just want a single person's gravity value modified, you'll have to probably write a own custom script so it applies directly to whatever you're using for your character controller.