The only way to add flags is by using the extra or comment fields in zipfiles. The problem: Zipmax removes them because usually they only contain obsolete data and make the zip bigger.

Zipmax marks each and any file with +a (and current date/time iirc) after it was performed. So set your fileflags to -a before zipmaxing and you easily see which were run through zipmax.

Roman Scherzer
ClrMamePro