Another seat cover replacement

Ok, I've used the search and looked over some of the threads on the process. The one I looked at shows buckets seats, but the process should be pretty much the same right? That is a question by the way. The main difference I have seen is all the seats have foam, where in my 70 Dart it is a cotton batting type material. Just looked at the one video on You Tube on seat recovering. How many here have replaced the cotton material with foam? Winter time is coming, and I don't think much painting will get done. I have the interior pieces with the exception of the rear seat, but since I won't be doing any sitting there, it can wait. Ok, who here has replaced the cotton with foam?