first of all i don't have any expertise whatsoever in php, css, html - in fact i even think they're difficult to pronounce!
i've managed to get the file in question to work, by trial and error and by comparing the original rss file with the one from melon (thanks again!)
i've noticed that there was something missing in this bit:
"if(!checkAlbumPassword($albumcheck['folder'])) {" >>> melon-file
and i replaced it with this:
"if(!checkAlbumPassword($albumcheck['folder'], $hint)) {" >>>original rss
i also played around with the melon-file and "commenting-off" some of the "$output" entries.
maybe all that has nothing to do with it, but it seems to work. i'm using zenphoto 114 and some albums are protected.