|"Windows Vista itself has to be installed and run on an NTFS partition - it won't run on a FAT32 one"|
>>Not according to Microsoft. They say it will run on a FAT32 file system.<<
You are right, but it's not that simple.
Vista will only install on an NTFS partition by default. It can be made to run on FAT32 after installation, but only after a considerable amount of work on the part of the user, which must be done before installing any third-party drivers, applications or updates.
Not quite the same as a normal installation is it?