after a successful run of the batch file, the temp1 and temp2 folders should be gone. you should have several .ax and .dll files in the main SoftPVR folder, and I suspect you don't. It sounds like you didn't modify the batch file correctly. The only change to the batch file is "3g" instead of "2d":
the version I posted above in post #5 has this change, and I just successfully ran it against the current wintv7 2.3g download.
"%PROGRAMFILES%\NPVR\SoftPVR\wintv7_cd_2.3g.exe" /x %PROGRAMFILES%\NPVR\SoftPVR\temp1