I have  tried for some month now  to do some re skinning.   I downloaded "Train mesh viewer"  and "Paint Net" and then    followed  the different "how to do" from  Trainz WIKI . I successfully loaded  the Loco on the TMV  but  cannot  open  any file  with the  extension "IM". According to the instruction a  folder should have open  this file  and display  some TGA  files  for editing . This did  not happened . So checking back I realize that the mesh  Viewer  was designed  for TR 2009 & 2010.  Furthermore simplified  instructions from Wiki  "how to  re-skin"  clearly  explain  for TGA  files for  which are not there  in 2012
				
			