Windows 7 Task Pane Changer is a freeware from door2windows that allows you to change your task pane in Windows 7 with one click.
Apps from door2windows are truly free and DON'T include any offers to install 3rd-party apps/adware/toolbars/unwanted software and never will. The apps are portable and don't require installation.
Download door2windows App Bundledoor2windows App Bundle gives you access to all the latest apps released by door2windows in one download (along with future updates).
How to use:
Run the tool as admin.
Click Change Color Bitmap and browse for the color bitmap. If you don't have any, you can get some from here.
Click Change Glass Bitmap and browse for the glass bitmap.
Now your computer will restart and the task pane will be changed. To restore it, click Restore Original Bitmaps.