For some inexplicable reason I thought that it is not possible :-)
My doubts were destroyed by .

Just move the <startbar> tag above the <border> tag in the /sitecore/shell/Applications/shell.xml file

<GridPanel Class="scFill scFixed"> <Startbar GridPanel.Class="scStartbar"/> <Border ID="Desktop" GridPanel.Class="scFill" ContextMenu="ShowContextMenu"> <Border ID="Links" DblClick="Launch"/> </Border> </GridPanel>

Result:
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](http://photos1.blogger.com/blogger/6839/1864/1600/taskbar.png)