Actually, replace the dumb door with another door object. Then, instead of exploding it, select it and right click. You should get a long popup. Find door properties and select it. In the proceeding dialog find a door open percent override. It is most likely set to 25. Now, when you say 50% to 100%, do you mean the door is open at a 45degree and you want it open to 90degrees? If so, you'll notice the override or standard is set to 25. You'll want 50% open for 90degrees as 100% would be 180degrees. Someone else with ADT readily accessible might be able to clear up my memory as my work workstation does not have ADT.