[CentOS] program to hide X11 windows

hi all

I am looking for a program that will "hide" a window when it opens under X11. There is a program called devilspie but it requires gnome-panel to be running to work.

On some of my workstations I dont have gnome-panel running.

So I was wondering if there is a program like devilspie that does not require gnome-panel to be running to hide a program window.

The window I am trying to hide is the openoffice impress window that edits the power point. I just want to show the power point.

is there such a program or is there a better method to not show the edit window on impress and just show the power point.

Thanks

Jerry