To round out some handy information that new FF1 rom-hackers might want to know, I added a section to the FF1 ROM Map to include the locations of free bytes in the original FF1 ROM.
Hopefully that helps anyone starting out who might be starved for bytes and not sure where to find them.
If anyone has any other information on this, or anything I've missed, please update the wiki ROM Map.
http://datacrystal.romhacking.net/wikid/index.php?title=Final_Fantasy:ROM_map&oldid=39117Thanks!