Aren't the .ASX files simply files that bind .ASF movie files together? When seen in a word processor (or Notepad), they're only written in a format similar to DHTML or XML and list the ASF files and the order in which to play them. As to how to convert movies to .ASF, head over to http://www.vcdhelp.com . They have a section about how to convert various formats to others, including ASF. Pugwash.