I don't know why so many of you are having save issues. I EEprom patched it via FATv8, and it now saves to a regular (64k) save slot on my F2A 256Mb. (EDIT) and i've backed it up and reflashed it via the Flash2Advance software (/EDIT)
But... I did find a glitch in the game, on the second mission, first level right after i went in to the hut at the first gate (after 1 sub objective and 2 sub objectives) the framing moved up to see what was a head but never came back to pick me up and i couldn't find my way back to where it was. oh well... hopefuly only a 1 time glitch.
Otherwise this game is awesome. Really tough... but lots of fun and worth the challange. That R "strife/aim" idea is really awesome. I just wish the game would let you back track more incase you forgot something, cause some times it won't even let you.