If you open the file in Excel, or compatible program, as tab delimited format you can edit texts and values easily and when saving the file it will be intact in the proper format without screwing up anything.
I've tested that with the database to add a different delay time and add light and alert settings. All fields are there in the database in the same order as the hpd files so it's just a matter of filling in the blanks. But there was some kind of quirk that I do not remember exactly when it happened but the scanner did an unnecessary filtering, too much firmware code, at some point that might have made the database edit pointless in a longer perspective.
/Ubbe