Ubuntu Installer-WUBI for Windows

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http://askubuntu.com – I'm using Windows 8 (32bit) customer preview and installing WUBI Ubuntu 12,04.1. I down loaded 32 bit installer from ubuntu dot com, The wubi installer says AMD 64 xt. I had a previous 12,04 install and in the terminal typed in uname -a, it say's 64 bit. I also opened detail from the system and it read 64 bit system. My question is; How to insure that a windows/wubi/ubuntu/installer is 32 bit or 64 bit BEFORE making a commitment to install from the wrong wubi install? (HowTos)