About Rainmeter taskbar shadow plugin
it is designed for taskbar on top situation,tested only in
win7 64 bit,
rainmeter 64bit,2.0 edition,
22 pix height, 1366 width taskbar.
you can edit it to suit your system.
DOWNLOAD
http://html5beta.com/files/shadow.zip
SCREENSHOT
Rainmeter taskbar shadow plugin