i think it was created for machinima and has only some animation fixed for wc3
i never use mdlvis, but with blender you can import vertex to kil'jaden model that use the same skeleton and change hardcoded textures, this model is a cata modified dragon-boss model that use as base the kiljaden skeleton
change bone numbers in 3ds/obj to fit with m2i skeleton and save it, open .3ds/obj and import m2i, make parent and join mesh with m2i model and delete kiljaden geoset, save it in m2i and merge with original m2
you need to know how bone number changes between model (for example 18 is 20 on nightelf model)now you need to swap 18 with 20 in the mesh proprietieswhen you change all the bones you can import mesh on skeleton (open it and import m2i, make parent and join mesh and export it into m2i)
you need to know how bone number changes between model (for example 18 is 20 on nightelf model)[img]http://s17.postimage.org/vfrzoeb3x/bone_swap1.jpg[/img]now you need to swap 18 with 20 in the mesh proprieties[img]http://s17.postimage.org/lwiauxnlp/bone_swap2.jpg[/img]when you change all the bones you can import mesh on skeleton (open it and import m2i, make parent and join mesh and export it into m2i)
you don't delete bone group, just replace bone(number) with (number) of the bones of new skeletonyou need to scale your model and fit it on the skeleton i think you must try with a more simple project to know how to work with blender and skeleton/bones