Chromium icon in task manager

Have been having a play with chromium for a while now and like it so have decided to make it my default browse.
As such I’d like to remove the firefox icon from the task manager and replace it with the chromium icon - which I have done and was easy enough.
However, upon launching chromium the icon remains in the task manager - it does not disappear like the firefox icon used to do once launched. Is there any way to make it exhibit the same behaviour and disappear once launched?

http://img803.imageshack.us/img803/777/taskmanager.th.jpg](http://imageshack.us/photo/my-images/803/taskmanager.jpg/)

Remove that icon you added, open chromium and right click on the opened chromium tab in the task bar, tick ‘show a launcher when not running’ and you are good to go.

ahhh, that’s it. Thanks.