Just have a pigtail cord made up so that one end connects to the generator outlet plug and the other end connects into the house dryer electrical plug ... first and foremost is to turn off and leave off the main breaker for the house and then turn off all individual breakers for the house, plug in the generator to the dryer plug and depending on the output of the generator turn on the individual breakers for the circuit you want to use in the house.
Folks down here have been doing this for years ... and years.
