I would agree with Dave in the use of Forgotten Trick being a standard action. You are, in effect, recalling something you had either chosen not to or been denied the chance to study and practice. You spend the greater part of 6 seconds, along with a supernatural augmentation (the 2 ki points) to gain an "AH-HA!" moment. The power states that you can use the forgotten trick for a number of rounds equal to the ninja level. in the case of your crane wing example you would need to spend 2 ki points as a standard action to gain the benefits of the crane wing feat for X number of rounds.
