Hi Adan, there are some instructions for installing scripts in the FAQ here:
http://moi3d.com/faq#Q:_How_do_I_install_a_plug-in_script.3F

It sounds like you've done the first step of copying the files into the commands folder. Once you have done that then the easiest way to trigger it is to set up a shortcut key with that command name. Also another way to run it is to press the Tab key, type the command name and then push Enter.

- Michael