You actually do not have to open them first. If you have you setting to see extensions just add .cbr or change .zip to .cbr
The problem with that is that, for these particular files at least, neither WinRAR nor CDisplay will allow the files to be read even though changing zip to cbr will correctly associate the file with CDisplay. They will STILL give an error message that the archive is not valid.
That's because the
inner file has NO extension in any of the files in my lists above. So while the outer zip can be renamed to cbr or cbz, CDisplay won't pick up any images from the inner file because since the inner file has no file extension, it won't be associated with CDisplay or ANY software program for that matter. As I stated in my big 9-step explanation, that's the crux of the problem with these particular zip files.
It's something Yoc and I have discussed a lot as you can see from this thread, and he agrees with the problem and the solution. Try one for yourself and see! We were really scratching our heads for awhile as to what was going on with the above-mentioned scans. Interestingly enough, we actually figured it out independently and then compared notes!