Hi Chipp - Hide is not exactly what is called a "Command" in MoI since you can run it while in the middle of an already running command. So to invoke it involves a slightly different method of putting in some script code in the shortcut key rather than putting in a command name.

For the specific code to put in, please check the help topic for shortcut keys here:
http://moi3d.com/3.0/docs/moi_command_reference11.htm#shortcutkeys

Scroll down past the command names listing there and the script needed for hide is listed just after those.

- Michael