To create a directory with MEL, use the following:
sysFile -makeDir $path_here ;
It took me 3 or 4 search strings to find how to do this today. All of the things I intuitively searched for brought up the wrong answers, so I hope this helps someone someday.
Besides the ramblings of a guy who likes to make things, Script Swell is a place to find MEL scripts, Maxscripts, Python tools and scripts for animators, cg artists, and anyone interested in improving their workflow and pipeline. The editor Jay Grenier is a technical artist currently residing in Burbank, CA.
"There are no limits. There are plateaus, but you must not stay there, you must go beyond them. If it kills you, it kills you. A man must constantly exceed his level." ~Bruce Lee