Hmm, it looks like at least part of my problem was that I associated .vbs files with Notepad++. Using
the fix here seems to have made it able to get past the first problem, but I still get "Windows cannot find tempxipmoduleslist.bat."
If I look in the Temp folder I see tempxipmoduleslist.tmp but not tempxipmoduleslist.bat.
But there's a lot of crap in the Temp folder, so maybe it did work? I've never done this before so I have nothing to compare to.