Yes you'll see there that each converter added its own unique style format.... mostly just a buncha useless crap that sections off each "channel" or section, and once you are familiar with MML you will notice what is actually MML and what is just a bunch of junk you don't need to worry about.
The not-needed stuff, is mostly just specifics to THAT converter and possibly player (3MLE for example.... goes with the Mabinogi game which uses MML files)
They are all pretty much what you would need. You just have to yank out the MML data itself.
Tinymm would just require you to take whats between the (ch1=======) and place in .channel section of a squirrel file.
The same goes for 3MLE MabiMML. just grab what is between the [channel ] markers, and ignore the /* M */ stuff, and anything else that begins with a /. Those are just comments in that editor that mark off each measure of the song, and important bits of info for THAT player only.
don't use that thread one. its far too much work to copy and is a mess.
and the 3ML3 Mabinogi one too....
if this isn't clear to you still, please let me know and I will help more!