directories needed to make Cygwin portable

[Garegin Asatryan]

I want to run Cygwin (to run ddrescue, among other things) on WinPE.
Which folders do I need from the Cygwin installation copied over.
Someone mentioned just the cygwin1.dll, but apparently that's not
enough. I tried the bin folder and ddrescue didn't throw any errors,
off the bat. What about the dev, etc, home, and lib folders. Do I need
them too?

--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple