You can find lots of M1 resources on
http://www.synthzone.com/korg.htm and you can download a sysex tool from
http://www.alesis.com/downloads/software/freeloader/ . You can also find sysex files at
http://synthzone.com/midi/korg/m1/ I always try to archive files for most synths.
Note though that almost all MIDI sequencers already support transmitting and receiving sysex data.
[This message has been edited by Nigel (edited 12-13-2005).]