Congrats man i too had the same virus from a pen drive.. Here is how you solve the issue..
Go to VIEW tab under FOLDER OPTIONS in your explorer window.. Uncheck "Hide protected OS files" and "Hide extensions of known file types" options.
Open the autorun file that you have in all your drives and find out the file name of the
vb script (something named like win**.dll.vbs).
You may open up the vbs file in notepad to analyse the source of it that may be located at C:\WINDOWS folder.
Delete all the occurences of the vbs file and autorun file in all drives...
At last you have to hunt for the same file in C:\WINDOWS folder.. This file is the heart for WSRIPT.EXE. Make sure you delete the WSCIPT.EXE process before deleting the vbs file in C:\WINDOWS.
And Bingo!! You have removed the virus successfullyy.. .