where is the HnS OPTION?

EasyBCD is a tool for the manipulation of the Vista/W7 BCD, primarily as a GUI for the Windows BCDedit command line utility, but including ever-more additional facilities not possible through BCDedit.
HnS is a customized Grub4dos bootmanager which surplants the Vista bootmgr, chaining Vista and XP boot processes as required.
It sits like this and is described here