You don't need to be a wise a**, i answered you question. The topic of this thread is "format with cluster size". You asked if there's any way to get the installer to change the allocation unit, you didn't specify what you meant by installer. Do you mean setup.exe or format.exe or what? I assumed by the topic of this thread that you want to use format, you never asked for a way to do this during setup. If you don't like my answers then next time don't be vague and assume people know exactly what you want. -gosh