Ora ho formattato vabeh.
Cmq il file era questo con installato 1 solo SO, precisamente "windows xp home edition" italiano.

[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(1)\WINDOW S
[operating systems]
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Micro soft Windows XP Home Edition" /noexecute=optin /fastdetect