Hello Lee Sauer,
We are not aware of this problem with our latest official release.
All of our controls should be available in the VisualStudio 2010 toolbox, just after installing them with our installer.
You don't have to perform any additional "tricks" in order to add them in the toolbox.
Can you please try to re-install the controls and let us know the result?
Attached is a screen shot of VS2010 with RadMediaPlayer just added from the toolbox. The RadMediaPlayer components are in the upper left corner of the picture.
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