Gnome-2.16.0 Windows on top option grayed out
I am running Fedora Core 6 with Gnome 2.16.0 and I was wondering is there a way to keep a window on top of other windows For instance, when I am watching a movie and I would like to keep the window on top whenever I am browsing the web? In KDE, it is as simple as right clicking the title and selecting stay on top. Whenever I click the top left hand corner, the "on top" option is grayed out in Gnome. How can I use this option in Gnome 2.16.0? I have searched google with nothing available atleast using Gnome version 2.16.0.
Thanks in advance