don't use that tutorial. it's outdated and contains incorrect information. this one isn't as basic though it contains a lot better information: http://cg.tutsplus.com/tutorials/autodesk-3ds-max/project-workflow-creating-a-next-gen-sci-fi-prop-day-2/
Two threads up from this, is a sticky http://boards.polycount.net/showflat.php?Cat=0&Number=81058&an=0&page=0#Post81058 Contains a lot of discussion on the subject, probably a good place to start, and I'm pretty sure contains links to relevant articles.
Hi all, I want to introduce you to the project of clothing that you can take advantage of commercial projects! This package contains the files - clo3d and Marvelous designer 5 with ready-made models of pants and a shirt. Also contains a pdf file with information about the models shirt. dxf - files of patterns! GUMROAD