110v vs 220v AC plug

Hi guys, my gophert cps 1620 arrived today, which operates on either 110 or 220v, switchable... but it came with a 220v plug. doh!

??? I actually no nothing about 220v, even though I've wired houses with 110. I've simply never needed to learn about it. It's 3 prong, so I'm guessing it uses two hot leads and one neutral? (no ground).

??? Is it just a matter of cutting off the plug and replacing it with a standard 3 prong 110 plug, and using the two hots as the hot and neutral, and the neutral as the ground?

thanks!