Update documentation to reflect flashrom->flashprog transition in newer Heads firmware

Co-authored-by: tlaurion <[email protected]>

Author: Copilot

About/Historical-Legacy-Migration.md

@@ -86,7 +86,7 @@ It was possible to upgrade from Legacy to Maximized boards under certain conditi
 
 - **If you come from 1vyrain, this was impossible**. 1vyrain does not unlock neither IFD nor ME regions of the SPI. Consequently, flashing internally anything else then Legacy boards produced ROMs would result in a brick.
 
-- **If coming from Skulls**, if and only optional unlocking step has been followed, you could upgrade internally through a manual flashrom call, just like if you were coming from Heads Legacy boards while having followed the me_cleaning page instructions prior of initial flash.
+- **If coming from Skulls**, if and only optional unlocking step has been followed, you could upgrade internally through a manual flash tool call (`flashprog` on newer firmware or `flashrom` on older firmware), just like if you were coming from Heads Legacy boards while having followed the me_cleaning page instructions prior of initial flash.
 
 - **If coming from Skulls or Heads Legacy board configurations** while having unlocked IFD initially, you could flash from the recovery shell manually.
 
@@ -96,9 +96,11 @@ Having a full xxxx-hotp-maximized or xxxx-maximized board config produced ROM av
 
 ```
 mount-usb
-flashrom -p internal -w /media/PathToMaximizedRom.rom
+flashprog -p internal -w /media/PathToMaximizedRom.rom
 ```
 
+**Note**: Use `flashprog` on newer Heads firmware (2025+) or `flashrom` on older firmware versions, depending on what is available in your Heads system.
+
 On next reboot, Heads would guide you into factory resetting your USB Security dongle or import your previously generated public key matching your USB Security dongle's private key.
 
 It would then regenerate a TOTP/HOTP secret and sign /boot content. You would then have to define a new default boot and optionally renew/change your Disk Unlock Key to be released to to OS to unlock your encrypted OS installation to move forward.

Installing-and-Configuring/Upgrading.md

@@ -164,9 +164,11 @@ First, verify the [supported platforms]({{ site.baseurl }}/Prerequisites#support
 Review whether the Intel Firmware Descriptor (IFD) and Intel Management Engine (ME) regions are unlocked from the [Recovery Shell]({{ site.baseurl }}/RecoveryShell):
 
 ```shell
-flashrom -p internal
+flashprog -p internal
 ```
 
+**Note**: On older Heads firmware (pre-2025), use `flashrom -p internal` if `flashprog` is not available. Newer firmware versions use `flashprog` as the flash tool.
+
 The output will show whether you can upgrade internally or need external flashing.
 
 Unlocked IFD and ME (Modern Firmware)
@@ -177,7 +179,7 @@ This is the expected output for modern Heads firmware with unlocked IFD and ME r
 - **Current firmware**: You can safely upgrade through the Heads GUI using `.zip` files
 - **Very old firmware**: If upgrading from pre-2024 firmware, you may need to manually flash:
   - `mount-usb`
-  - `flashrom -p internal -w /media/heads-current-version-gcommit.rom`
+  - `flashprog -p internal -w /media/heads-current-version-gcommit.rom` (or `flashrom` on older firmware)
   - ![InternalUpgradeToMaximizedROM](https://user-images.githubusercontent.com/827570/167729694-6ff8da60-986a-4ec3-9b2d-4fa94e42d3fa.jpeg)
 
 Locked IFD and ME (Very Old Firmware)

Installing-and-Configuring/configuring-keys.md

@@ -146,7 +146,7 @@ inserted. Select "Add a GPG key to the running BIOS" to enter the GPG
 Management menu, then "Add a GPG key to the running BIOS + reflash". Follow the 
 steps and your GPG key will be added to the Heads rom.
 
-Once `flashrom` is complete, reboot and now you should now be back in the Heads 
+Once the flash tool (`flashprog` on newer firmware or `flashrom` on older firmware) is complete, reboot and now you should now be back in the Heads 
 runtime. It should display a message that it is unable to unseal TOTP.
 
 ## Configuring the TPM