Mach3 simulator

Hey guys, does anyone know how to utilize mach3 with actual drawing g-code WITHOUT the table hooked up?? I was doing it when my table was being shipped and i was verifying and practicing my work in the program before even getting the table. I KNOW ITS POSSIBLE, other forums people saying a bunch of different things but they all involve using a controller plugged in, but i assure u its not necessary. if anyone has the answer its greatly appreciated.