Thanks ElDiabloConCaca for the 'unstuff' information.
With 'unstuff' (as the result of installing 'StuffIt Deluxe' version 9) in '/usr/local/sbin/' and 'unstuff -F' <return> entered, the formats supported by 'unstuff' were displayed. They are ...
apple, arc, arj, bin, btoa, bz2, cab, compress, cpt, double, freeze, gz, hqx, lha, mime, pack, pf, rar, sco, sit, sit5, sitseg, sitx, tar, uu, yenc, and zip
... Thus, to decompress 'InstallerUpdate1.0.dmg.bin' and then mount the '.dmg' file - if on the current_user's 'Desktop', one would enter ...
/usr/local/bin/unstuff /Users/current_user/Desktop/InstallerUpdate1.0.dmg.bin; hdid /Users/current_user/Desktop/InstallerUpdate1.0.dmg
..., as one example.