Quoted from busa32927:the contents of the delta file is different than on the install videos for delta code. what folder do you put on the thumb drive? the delta has the manual in it and a few other files.
after unzipping the file, drag the entire "woz_update" folder to the root of the thumb drive. insert the thumb drive in to the usb extension cable located by the coin box. enter the test menu, down to "utilities" and then to "update software".
that should do it.