mule encoding

while playing around with this Mule and thai stuff, I've managed to at least get Emacs20.2 to display correct thai script based on the TUTORIAL.th. but when i try reading in a file from a friend that he claims has thai in it, i just get garbage. And he couldn't read TUTORIAL.th into the editor he has (he looking to switch cuz he not real hot on it. I have a suspicion of what the problem is. His editor is named UniEd. So i'm thinking it's a Unicode editor, which we don't handle right? What is the proper name for the encoding mule handles. I told him I thought we used thai-tis620 or something like that. anyone know of converters between unicode and other encodings? hopefully something that could be run at the command line as a filter. btw getting a little closer on getting thai working in xemacs. jeff