I had the same problem. I'm using CodeWarrior USB TAP on windows 7.
Tried over and over again to install windrvr6.sys.
This is the error I had:
Command line: C:\Tools\CodeWarrior\ccs\drivers\usb\util\wdreg_gui.exe -inf windrvr6.inf -log setup.log install
Trying to create WinDriver fake device
Error: Failed to install the INF file (C:\Tools\CodeWarrior\ccs\drivers\usb\windrvr6.inf)
Error updating the driver (hwid:*WINDRVR6) with the INF file: The system cannot find the file specified.
In ccs, "show wdv" told me "WinDriver is not installed"
I got it working by downloading and installing the latest drivers of a P&E Micro programmer. (DRIVERS10_install.exe)
P&E programmers apparently need the same Jungo WinDriver as CCS needs.
Now in ccs, "show wdv" tells me "WinDriver v10.10 Jungo (c) 1997 - 2009 Build Date: Sep 2 2009 X86 32bit SYS 12:13:52"