Help; import MIDI without converting? (to keep filesize manageable)

I have to make a looooooooong flash video, with several minutes of music, and I wanted to keep the file size reasonable… The sound is in MIDI initially, but when I tried to load it with flash, it wouldn’t let me, so I converted to mp3… but then quickly realized what this would do to my filesize. So, the origional questions stands; Can flash use MIDI without blowing up the filesize into oblivion?