Having some issues getting some videos to play as in https://forum.videohelp.com/threads/330321-wmp-win7-not-playing-certain-mpeg1-files-gsp...-info-included

I got them working but still dont get a preview thumbnail in explorer. The XP machine im posting on now has no issues with the files, can I add a custom thumbnail to the icons that dont work or somehow take the thumbnail data from this XP machine and add it to the file on win 7?

Thanks for any advice.