i thought i made a comment somewhere around here about that. the solution i found was that a file was misnamed, so you'll have to go into the files and rename it to that. as i recall, it was capitalizing the A at the end, or something...
Edit: ah, thaaaat's right, i remember now... "not sure if anyone posted this yet, but the game keeps stopping during the pyramid. i had to change a file to "El Infausto Ladrón de Joyas A.rpgmvo", notice the "ó" in "Ladrón""