I would keep the radiator cap off as well. It should speed up the bleeding process. Make sure to keep an eye on the level in the radiator, not the overflow tank, and keep topping off until it stops dropping.
If the cap were the high spot, they wouldn't need the bleeder.
I'd follow dodges instructions, but, barring that, warm it up with the cap off but slam the cap on when it starts overflowing from there. Then open the bleeder, get the air out, close it, and let everything cool, sucking coolant in from the overflow tank.
Let it cool, note the overflow tank level, top off if required, note level, repeat.
Go for a drive facing up the steepest hill you can find, and gun it in low gear.