I've searched for what you asked, but there is little information about it, therefore the best place to get help about its usage is still through the Help section already available within the program. I've downloaded CombineZP from the download page here on Software Informer (possibly the only place available to download this little piece of program).
I've checked the Help section and there is a Getting Started section that provides all the necessary information related to usage.
If you need another copy, download it from here: http://combinezp.software.informer.com/download/