usage: 1-copy fs.mel into script directory. 2-run maya . 3-in command line type fs;
if you want script automatically be run after launch maya, create usersetup.mel in your script directory(if doesent exist already) and add this code into that in new line:
 fs;
you can edit this script for create your buttons. just replace your lable and after -c into "" type your command.

or tell me for put your command into buttons.