I've never found corn to be too bad. We source our corn from a grain elevator about 45 mins north of Indianapolis. The process is similar to what others have said,
mix corn and water at about 2lbs / gallon (I have gone as high as 4 lbs as an experiment)
adjust ph; add ht alpha am.
heat to 190 / hold until negative starch
lower to about 170 / add "other grains"
add gluco am
sach rest (add b glucan if it's rye-gooey)
cool to pitching temp
pitch yeast
This is from memory but it's close to being correct. All grain ground to flour.