I am having this same problem, I re-downloaded the files and the same thing happens the error occurs:

\"NSIS ERROR

Installer incorrupt or incomplete.

This could be the result of a failed download or corruption from a virus.

If desperate, try the /NCRC command line switch
(NOT recommended)\"

and i tried the md5sum application it just opens then closes with nothing in the window but a blank black screen (how do you use it?)

anyone know what the problem could be? thx
EDIT: nvm i think i didnt let the reassembler finish lol dummy > me