DivX Web Player preview image while buffering

I was hoping that the 'previewImage' parameter within the DivX Web Player object tags code would display an image while the video was buffering, much like the 'ShowWhileBuffering' parameter which can be used in an asx file when displaying embedded Windows Media files. But apparently with the DivX Web Player you have to turn off the autoplay function so you can only use 'previewImage' when the user has to manually click the play button and then you get the normal 'buffering' message while the video is buffering. If you enable autoplay you just get a lot of flickering during the buffering!

However, I noticed that the 'custommode' function does have something to do with the display while buffering as the param name="custommode" value="Stage6" tag introduces a rather ugly number '6' in front of the 'buffering' message which disappears if you delete the references to Stage 6 (since that service is now defunct anyway).

So my question is: Is there a way to design your own 'custommode' parameters to display an alternative graphic or image while buffering?

Anyway, at least the default buffering graphics are quite nice if you get rid of the ugly 6.. LOL