How to make knights change places.

[Apjjm]

Your best bet here (if you want actual movement) is to use sticky areas. Place one sticky area per knight, where you want the knights to stand, then use the function AttachPropToStickyArea (see wiki for syntax). You will want to have the sticky area attachment disabled initially, and also set it up so the attached props still collide. You will want to also use SetAllowStickyAreaAttachment to enable the attachment before attaching the knight. The other settings in the area is something you are going to need to have a play around with.