Thanks.
The file system that ZP uses is actually one of the reasons I like it and use it. I don't really understand why ZPP uses the ID number. It would be easy to figure out except that over the two or so years I've used ZP, I've deleted albums and images. So there is no way to tell by looking at the sort order what is number what. For instance, the first album sorted is number 2, and the second is 28. I have 35 albums so it's just impossible.
Like I said, I wrote an email to the developer and I hope to get some clarification. There must be more than just me using this darn plug-in.
Brian