Hidden attribute on tasklist?

[Woodrow <wfcall onewest net>]

    I use Gkrellm with Gnome on a Mandrake 7.1 distro. I'd like to keep
Gkrellm from showing up on the task list. I tried starting it with the
-wm switch and setting the tasklist toggle, but when I start a new Gnome
session without the -wm switch it appears in the taskbar again. Is there
a configuration file somewhere where I can set the ignore-tasklist
toggle permanently? I looked through the tasklist help and mailing list
archives, and found no answers. Has anyone done this that could pass on
what they did? It would be greatly appreciated.
                        Thanks for any help.
                                                            Woodrow