Galaxyfilm, no these are not positionable because they are textures for bump or displacement use. Of course you can make your own tracks in PS or so, but it's a real tricky thing.

I've made a second post after my first with a hint to the Footsteps Tool by Nerd3D, but the Rendo admin has deleted this one. Unfortunately this tool (former DAZ3D) is not longer available and so you have to contact Nerd3D and ask him why. I'm thinking that the tool (released 2008-12-16) would not run any more in newer Poser versions!??

Henning