Il mio inizia diversamente (win server 2003 english), te lo incollo fino a trovare le righe che hai postato tu



[Version]
signature="$Windows NT$"
ClassGUID={00000000-0000-0000-0000-000000000000}

[SourceDisksNames]
_x = %cdname%,%cdtagfile%,,""
_1 = %cdname%,%cdtagfile%,,""
_2 = %cdname%,%cdtagfile%,,""
_3 = %cdname%,%cdtagfile%,,""
_4 = %cdname%,%cdtagfile%,,""
_5 = %cdname%,%cdtagfile%,,""
_6 = %cdname%,%cdtagfile%,,""
_7 = %cdname%,%cdtagfile%,,""
1_ = %cdname%,%cdtagfile%,,""
2_ = %cdname%,%cdtagfile%,,""
3_ = %cdname%,%cdtagfile%,,""
4_ = %cdname%,%cdtagfile%,,""
5_ = %cdname%,%cdtagfile%,,""
6_ = %cdname%,%cdtagfile%,,""
7_ = %cdname%,%cdtagfile%,,""

[SourceDisksNames.x86]
1 = %cdname%,%cdtagfilei%,,\i386
_1 = %bootname1%,"%boottagfile1%",,""