Thanks everyone for your thoughts. Electricity definitely makes me nervous so based on your input I think I would rather play it safe and just run the 4 extension cords from each of the 4 120v outlets rather than risk a fire or something bad happening.
In regards to the type of extension cords...
Just received my new PB last week and trying to get a game plan for using the 7.2kw generator for when our power goes out to run my sons medical equipment as well as other basic household items (freezer, fridge, etc.).
From what I've read so far it looks like you have to use the single 240v...