2 mithra edits, 3 sort of.. atari hoodie, hakama (normally male-only style), and rng camo-wear. also have blue jeans, but too small of an edit to post

camo:
http://dan-rouse.com/ffimg/mods/rng_camo.jpg
for actual building models from scratch, the best way i see to do is open the models in VRS(link can be found on bbs posts, i don't have it anymore) export to something more usable(the program itself is very limited) such as .3ds, open and edit to your liking, reverse the process to put it back in the game. a friend of mine exports to maya and makes funny things

MQ itself is very limited, the export method modelviewer uses is very much static...removing or creating polygons makes for errors, so all you can really do is resize and move around.
i'm making tarutaru bunny suit right now for kicks, i was told it was made before(only a screenshot though, no download)...anyone have a link to that picture?