The animations do exist, there are turning animations in the GLA file that was used in JK2 SP but not in JA AFAIK. It's just a simple shuffling of the feet and rotation of the hips. I made them for my high def AT-ST and they work in JK2 SP, the player has them as well. Seems like you'd just have to figure out a proper combo of buttons, much like how the backwards slash works and program the rotation of the character. The games I've played that had it didn't have a dedicated key to do this but rather 2 that were pushed simultaneously that were already bound to something else.