[HTC One X] feraay:
Just look in the flash.cfg trip made

Ebt hboot partition is ID 4

But you have to use trips flash.cfg with nvflash to get things on the right partitions

[partition]

name=EBT

id=4

type=bootloader

allocation_policy=sequential

filesystem_type=basic

start_location=0x600000

size=0x400000

file_system_attribute=0

partition_attribute=0

allocation_attribute=8

percent_reserved=0

filename=hboot.img

Test

nvflash --list

Output?

nvflash.exe -r --go this should may exit apx mode if u are ready but i dont know its a tegra 2 command from Transformer but it works with wheeli and blobs

This are Commands to flash New PC BIOS via nvflash but i belive this hell to understand nvflash a bit better

-- Primary Commands --
Update firmware: nvflash [options] <filename>
Save firmware to file: nvflash [options] --save <filename>
Compare adapter firmware: nvflash [options] --compare <filename>
Update TV data: nvflash [options] --tv <filename>
Display version: nvflash [options] --version [<filename>]
Display firmware bytes: nvflash [options] --display [bytes]
Check for supported EEPROM: nvflash [options] --check
Write protect EEPROM: nvflash [options] --protecton
Remove write protect: nvflash [options] --protectoff
Change soft straps: nvflash [options] --straps=<straps>
Set IEEE 1394 GUID: nvflash [options] --guid=<guid>
Set IEEE 1394 GUID source: nvflash [options] --guidsource=<location>
List adapters: nvflash [options] --list

-- Commands and Options --
help ? Display this screen.
save b <filename> Read EEPROM and save to <filename>.
compare k <filename> Read EEPROM and compare with <filename>.
tv x <filename> Transfer TV data from file to EEPROM.
version v <filename> Display file version and ~CRC32
(if no filename, acts on display adapter).
display d [bytes] Display 256 the first bytes of the EEPROM
(default is 256 bytes)
check c Check for supported EEPROM.
protecton w Write protect EEPROM (only on some EEPROM's).
protectoff r Remove EEPROM write protect (only on some EEPROM's).
straps m <straps> Change soft straps.
format is: AND Mask 0, OR Mask 0, AND Mask 1, OR Mask 1
guid q <guid> Set the IEEE 1394 GUID in the firmware image
(GUID is in the form of 16 hex digits).
guidsource 1 <location> Set the source of the IEEE 1394 GUID.
main - main EEPROM image
dedicated - separate serial EEPROM part
list a List all NVIDIA display adapters found in the system.
nolight l Do not light keyboard LEDs.
overridetype 5 Allow firmware and adapter PCI device ID mismatch.
overridesub 6 Allow firmware and adapter PCI subsystem ID mismatch.
reboot y Reboot the PC after other tasks completed.
keepstraps g Keep the soft straps already present in the EEPROM
after flashing the new image.
romstrap j Override the ROM strap setting to allow flashing an
image when grounding the STRAP_SUB_VENDOR pin.
This allows flashing a corrupted or erased EEPROM.
Note: Make sure there is a physical EEPROM present
when using this option
index i <index> Force a specific device index.
fwindex F <fw index> Index of which firmware image to use from a firmware
bundle.
auto A When possible, run without user intervention.
directpci n Bypass the PCI BIOS.
silence s <level> Silence level:
default All beeps.
#=4 (or 2) No progress beeps.
#=5 (or 1) No beeps.
override o <level> Override safety check level:
default unknown EEPROM | NV adapter aborts application.
level=1 unknown EEPROM acceptable for read operations.
level=2 unknown NV adapter acceptable for read operations.
level=3 Combined effect of 1,2 (cannot write to unknown EEPROM or adapter).

Use a single dash ("-") to use the single letter version of a command.
Use a double dash ("--") to use the longer descriptive version of a command.
Use equals ("=") to specify parameters, with separating commas (",").