First it says I must fold the waistband over, with the cast on folding to the inside of the body. IT says to be sure that the fold is smooth and there are no wrinkles or puckers in the waistband. It says to look closely at the cats on row, and you will see that it has a smooth line for each stitch, with a purl-like bump behind that smooth line
It then says insert the left needle tip under the cast on (that smooth line part) so that the line now seems like a stitch on the left needle.
Knit the stitch and the cast on together (same as if they were two normal stitches and you were working a k2tog).
Repeat the two steps above until all but the last 5 stitches are worked.
I guess I should try it, eh? I'm just a little scared to try it. I don't want to insert the needle into the wrong place. I wish I had someone here to show me.