Heh, once, in a pinch, I have made due with a "special" extension cord - with two 3 prong 110 heads spliced onto a 220 socket... All I had to do was find two outlets on different phases and I was in business
Ridgid and other brands sell cords that split 220 into 110. They are made to be used with their generators and work like a charm. No need to cut them up after you are done.
"Trust me. I know what I'm doing." -- Sledge Hammer