You can do the same using SRL and GARbro. GARbro provides the ability to extract .cpz archives and .pb2/.pb3 images through UI, while SRL provides string replacements(editing scripts), It has auto install for CMVS engine, so it should be able to cover every CMVS game. imo it's a lot more convenient than having to use cmd. I also cooked up a simple piece of code which renames images from .png to .pb3 and vice versa, which you can download here(includes both the executable and source code).
If you want a more detailed guide on how to do it with this approach, you can find it here