I think RealPlayer is the only app that will play RM video files. You can change the default by selecting the file outside of LW, then going to menu File>Properties>Open with & then choose your application to open that type of file. There's another option that says Open all files with ... so choose that one & it will become the default app for that type of file. You would do that with each type of file you want another app to open with instead. Another player with built-in codecs & is free is VLC: http://www.videolan.org/vlc/ (choose nearest mirror site) I hope that answers your question.