uploading shortly a new update for Site Map XML to version 4 for ZC1.5.7 if accepted, should show up on it's own. If you are interested in helping out, got some ideas or just want something to play with, GitHub location.

I still have some things I want to play with, but for now as is it's working as before on ZC1.5.7 and PHP7.4 with allot easier install. A number of files was changed or deleted, thus I would not suggest this as a easy update, but a new install.