Would love it if you put your zone in your signature, figarita. Gene, I think Arkansas is kinda humid, and maybe that is the problem with the rotting, but I am speaking from zero experience.
We do have cuttings just stuck straight into the ground, per some post on garden web (and although we water, I fear they will dry out). We could use a few hundred more roses, so we are giving it a whirl. If the sticks in the ground don't work, and we will soon know, we'll try the potato thing. Nothing ventured......... A 10 lb bag of spuds is cheap at Walmart, and when our existing roses bloom, there will be plenty of opportunities to try cuttings with or without potatoes!
Suzi