The parent comment shows two rows of different types - the upper row consists of the taskbar, and the lower row has the quick launch icons, drive links, and a music bar.
It's not. You can add quick launch icons and drive shortcuts natively (right click > Toolbars > New Toolbar). I only use Taskbar Tweaker to replace the Windows Aero-style tooltip with the standard jump list right click menu.
The media taskbar player can be added natively from older versions of iTunes, Windows Media Player, or others.
