Do Elves and the detect secret doors spell work properly in this module? A friend and I are playing locally - for the first time on this module! - and I'm curious if going Elf is viable for the auto-search.
IIRC Elves actually don't get any special treatment in regards to secret door detection in ToEE, and for the KotB mod specifically, you should be using the search tool that is in your starting inventory to search for secret doors.
What he said. The plot-critical secret doors (such as on one of the outdoor maps...) are (for memory) set with an invisible critter and heartbeat to check for players and do a Elf-style auto-search, but the others will require active searching. The Elf should get their +2 bonus though.