Go into the TAB settings, select GENERAL CONTROLS, then find the commands you want and hit enter once, then press the buttons you want for that command. Remember that when you change the tab key, you will have to use the new config to get out of the menu. Also, if you want to remap the ESC key, be carefull! When you remap that key, you will be forced to use the new config to close a game.
But the ipac has all these pre-configured with the "shift" key, just move the wires around to match the ipac functions...