Sorry to resurrect an old thread, but I don't suppose you still have these tutorials, @EarthQuake? They don't appear to be on the Marmoset website any more? And I can't find them via a Google search. Thanks.
Wayback Machine has it. https://web.archive.org/web/20130508184237/http://www.marmoset.co/toolbag/learn/character-lighting I suspect the old tutorials use outdated workflows, so they were probably just not worth the effort of updating.