I don't think that RhinoArt will work with MoI - first of all it is a Rhino plug-in so you definitely need Rhino to run it, and then also it looks like it generates triangle mesh data.
MoI doesn't work with that kind of triangle mesh data - MoI is only currently focused on working on NURBS surface type data instead...
One thing you might want to check out is zsurf, which can generate a NURBS relief type surface from an image, it might be able to do what you need. Check out these posts for some more information:
