unzipping should be fine on windows.
ii) shell access, ensure you know its working already!
iii) an iLiad
a) unzip wpatch.zip on windows machine
b) copy directory to iLiad... however you normally move things
shouldnt matter if you do this, by mounting iLiad, copy to usb, etc etc
as long as you can see files on iLiad afterwards
c) find files on iLiad, in wpatch directory, click on installpatch.sh
you wont see anything happen, but its its the normal timing issue it should just work
if its doesnt work, then
click on installdebug.sh
this will create a file wireless.txt called Internal Memory, copy that file to windows, and post here
(noting my comments above about passwords and ssids