I do all of my batches CPOP with the exception of my goat's milk soap. CPOP is somewhat combining the CP & HP methods because you are cooking it to force a complete gel sooner. You can use CPOP sooner, shouldn't get the tightness, but I still cure mine for a min. of 4 weeks to make the bars harder. As for a liner, I just use wax paper. Have been using it for a couple of years now and it works great for me. I put it in at 170 for 2-3 hours depending on how soon it reaches full gel. Some FO's gel quicker than others. Pull it out and let it sit until the next day, cut and cure. HTH April