Well this is definately off-topic but in any event... mcopy,
mdir, mdel, etc. are part of the mtools package, not a unique
Slackware set of tools. These tools are for reading/writing to
DOS disks without explictly mounting them and are availible for
a number of platforms including Linux and Solaris (the 2 I know
about). According to the URL in my RH 5.2 package list, you
can probably checkout
http://www.tux.org/pub/tux/knaff/mtools/index.html for the
latest tar or go to linuxberg, it's got to be buired there
somewhere.
Adrian