xscrensaver: how to let multimedia keys pass through?

[Erik Steffl <steffl@bigfoot.com>]

  is there any way to make xscrensaver to ignore the some keys and let 
them through? I would like to be able to control the xmms even when the 
screen is locked (i.e. the multi-media keys play, stop, next, prev, volume)

  is that possible? it doesn't seem like xscreensaver supports it, is 
there some way to fool it?

  TIA

	erik