Step 1: Set the Dismemberment Threshold to -1. (Example)

Step 2: Open Single Player.

Step 3: Move the joints you want to move. (no space)

Step 4: Press Shift and Space once so all joints go red.

Step 5: Press "R" for replay. (no joints will break in the replay)

Step 6: On the replay, press Shift and Space until you get to the frame you want.

Step 7: Press "E" for edit them move the joints you want to move.

Step 8: Press Shift and Space once so joints go red.

Step 9: Repeat Step 5 to 8 until satisfied.