Widget in canvas

Hi,

I'm trying to play a video in a canvas widget ... and it almost works, 
using a GWindow.socket as a GnoCanvas.widget and running a mplayer 
process (with the -wid option) inside. However, this GnoCanvas.widget is 
always on top of all the other items of the canvas. A call to the 
#lower_to_bottom method does not seem to affect it.
Is it possible to display a canvas item on top of this GnoCanvas.widget ?

Thanks

--Pascal