Windows Calendar: Making Reminders pop up on top of other windows   

I'm using Windows Calendar (the one included w/Vista) for appointments, but I 
sometimes miss reminder messages, since they are popping up underneath other 
windows, and I don't always hear the chime.  Does anyone know of a way to 
force the reminder windows to pop up above all other windows?

If it matters, I'm using Vista 64-bit Business edition.

date: Mon, 18 Aug 2008 14:34:03 -0700   author:   John