Strangely with all the Windows 7 taskbar feature and the new Jump list, the taskbar itself does not support pin folders onto it. Windows only allow user to pin executable programs in the taskbar, so if you want to pin specific folders on the taskbar you need to trick Windows think its a program at first.
Here is the work around how you can pin a folder on the Taskbar
1. Create a new dummy .exe file
Right click anywhere and create a new text file, make sure you have turned on the extension in folder option. You can name whatever you want, and make sure change the extension to .exe
When it ask you this warning message say yes.
2. Pin the dummy program on the taskbar
Now you can pin this on the taskbar now
Right click go to properties >
You will see the Target is point to the dummy program you’ve just created on the desktop. At this point you can change the target to point it to the folder you would like it to be pin on the taskbar.
Here for example I’ve changed the Target to pointing to my W7H folder.
3. Customization change the look
Now you are pretty much done. However you can go future by changing the display icon.
If by default it icon path doesn’t point to the right icon set you can use the following path to find the icon you want.
Enjoy. You’ve just pined a folder on the taskbar.