Thanks for the responses, everyone. Almost completely by chance I came across a utility today that meets my criteria. This modified version of CleanArchiver can

Thanks for the responses, everyone. Almost completely by chance I came across a utility today that meets my criteria. This modified version of CleanArchiver can encrypt files, works in Snow Leopard and is free: http://trip2me.tistory.com/56 The article is in Korean and took a while for me to translate but the utility works.