ntoskrnl exe error vista install

ntoskrnl.exe error with Vista install?

Hi, I'm trying to install Vista Beta 2 64.
I currently run XP32, i downloaded the 64bit ISO and burnt it to a DVD, as i can't run the program from inside XP32 ("not a valid win32 app") i restarted and booted from the DVD.
It does the loading files part at the beginning and then says something about ntsokrnl.exe is missing before i even get chance to choose where to install it.
I have tried a md5 on it and it says it is a valid ISO... any ideas?

Windows Vista

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