Setting Stack's Location

[Bojsza]

It seems that this should be fairly easy ...I am trying to set a small 
sized stack at the location of an image of another stack that is much 
larger. I want the smaller stack to act as if it was an object of the 
larger stack (maintaining its position if the larger stack is moved, 
always on top of the larger stack etc).

Is there a "proper" way to approach this?

thanks,

Glen