This was tested on HBCD v15.2
- Format desired partition as FAT32 (type 0x0C), and make sure is primary (not logical).
- Copy entire HBCD folder to root of created partition (i.e. K:\HBCD).
- Copy from HBCD folder files GRLDR and MENU.LST to partition's root.
- Install Grub4Dos on the partition.
- Done!
I recommend using MiniXP from HBCD. You can do every described step, in particular installing Grub4Dos: (Menu Partition/Boot/MBR > Grub4Dos Installer. Choose Disk, Partition and click Install)
Source: http://thinkweird.info/2009/12/28/running-hirens-bootcd-from-hard-drive/