[OpenIndiana-discuss] Newbie question regarding graphical installer

[Martin Edgar]

Where does the graphical installer write the GRUB bootloader?
 
If I choose to install OpenIndiana to an entire external (USB) HDD, will the bootloader be written to this same HDD or will the first bootable disk on the system be automatically detected and used?
 
What I would actually like to do is install the bootloader to the same external HDD as OpenIndiana so that the PC will continue to automatically boot MS Windows unless I interrupt the BIOS and manually choose to boot from the USB HDD.  (I have done a similar thing with Red Hat derived Linux distros in the past).
 
Thanks in advance for any help on offer!
ME