Controlling mbedded WMV files

I plan to embed numerous short WMV clips in the first presentation I'm working on. I see that I can choose to include player controls or not, which is good. In some cases I'm requiring the viewer to watch the entire clip, but in other cases I'm leaving that up to the viewer. But after publishing to HTML, the standard Microsoft player controls are appearing instead under all WMV clips. How can I stop those controls from taking over?I also want to disallow use of the NEXT button until a 'required' video has finished playing. I thought I could do this using a variable that changes when the video is complete, but so far this isn't working at all. How do I ensure that a video is displayed before the viewer is allowed to move ahead?

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