the "redneck" way to do it is build a cord with two male ends on it, one end will plug into your generator, and the other will plug into your dryer plug....MAKE SURE YOU SHUT OFF THE MAIN POWER!!!!
never heard that before, but im far from an electrician. i was gonna suggest that he put some plugs outside and make his pumps plug in, instead of hard wired, that way he could plug them into the generator.