How to Opening .XMF and .XMD

[Net]

title says it all

 

[g8wayrebel]

Can't say without doubt , but it is a midi file I'd guess.
If so , try audacity.
It is free and one of ,if not the most versatile program for sound files I know of.
You should be able to convert it to a file your system can handle.
EDIT

Maybe I was wrong.

Look here:
http://www.fileinfo.net/extension/xmd