StackOverflow has a "How to" page that may be helpful:
The site refers to "emacsclientw.exe", but "gnuclientw.exe" settings would be similar, for example:
; This puts "emacs" into the right-click menu in Windows Explorer.
@="C:\\emacs\\bin\\gnuclientw -q \"%L\""
My subject line is probably a miss-quote since I don't recall what the
MS `power tool' was called that allowed user to open a dos command
window at whatever directory she was browsing using a right click
If anyone knows what I'm talking about, maybe you'll know if anyone
has ever written something for emacs that would allow user to open an
emacs terminal at whatever directory she is browsing.