> Does this program support multiple quest loading and/or scriptable levels?

it does/it will

there is an event system in place to make all the oldschool zelda events happen, like pushing a boulder opens a cave, or burning a bush/etc. this isn't active in this release because I simply haven't gotten to messing with it, but will be in future releases. Basically that'll all be handled through the map editor when that is ported. I've just been really busy and this port is the first thing I've finished.

fyi, right now the game is loading in overworld.map and the tilesets which are .pcx files

I didn't write the original code, so I'm not fully aquainted with the logic as I should be, but soon I will be.

as for multiple quests, yea, basically each cave or entrance is a 'portal' that leads to other .map files (heh except there are currently no other .map files that do anything)