We currently don't have a description for that setting: http://wiki.step-pro...m_INI/Landscape
By your description it sounds like it decreases/increases the friction the landscape has. If it does stop some things from skidding as much, increasing this a bit might be good thing. I've often seen objects or bodies just slide down a hill or mountain slope when they really shouldn't, and would have stopped sooner than they do due to their mass. I've always just chalked it up to how the havok works for Skyrim, but this could prove that wrong.