cannot extract downloaded sql installation program

i downloaded SQLEXPRWT_x64_ENU.exe
installation is ok. now I want to change the server sql collation.
according to mr google, by http://msdn.microsoft.com/en-us/library/ms179254(v=sql.110).aspx
I need to perform this setup at the sql server installation media.
I try to extract the contents from the exe, found this http://social.msdn.microsoft.com/Forums/en-US/sqlexpress/thread/137d88c2-40c0-421a-9821-b48d0dccf596
I ran the command at admin right elevated cmd prompt, but no output generated at the folder I specify.
I tried create/prepare the output folder, still blank.
what I want to is to change the sql collation, as need to pick 1 that's case-sensitive for TFS.
either someone guide me over changing the collation, or the extr ...