Issue with opening two editions of the same book

Hello,

I've been redirected to the forum from Calibre Help page.

First of all I would like to point that I don't want to discuss the way Calibre store files, I am looking for resolution of technical issue.

For my personal usage reasons I keep in Calibre different versions (editions) of the same document, versioned by Series; it works fine with Calibre books list but all the files has the same filename; also the same effect is when books has the same title with some change at the end (i.e XYZ Part 1, XYZ Part 2) long enough to be shortened by Calibre (in this case filenames will be XYZ - author, XYZ - author).

The issue is when I try to open few books/documents in the same time - in many cases software doesn't accept multiple files with the same name opened in the same time.

I realized that Calibre marks versions of the same book by unique ID added to folder name; my problem could be simply solved by adding the same ID also to file name. Could you kindly educate me how to do this?

Thank you in advance.
Regards
Sedziwoj