Planet Zaxxon

So I've been trying to figure out for some time now.. how to convert midi files into .smf files or the Yamaha QX3 format.. I searched all over the world wide web, and tried all sorts of file converters... I could only find ONE converter that says it will do this.. and Its $55! ( )  Ha. I will not spend 55 dollars to convert midi files. Does anyone happen to know of any other midi file converters? I'md dying over here.