[MDA III, XDA III, PDA2k, 9090 General] joey jojo:
Below is how to Downgrade a WM5 Rom to the Latest Offical Rom (Currenty 1.42)the part you need to take note of is the highlighted bold on how to format the Ext Rom.

Downgrade Instructions

* First please save all your data, cause you will lose everything!

1.

Locate the Downgrade software

* If you followed the Wiki instructions you will find the files in "??Your_DIR??\Downgrade to WM2003SE" folder.

* Else Download the BA WM5 Downgrade pack.

* Unrar (UnZip) it with WinRar.

2.

Download your favorite WM2003SE ROM

* Download rom from Available Original Shipped ROM Versions

* Extract the files (Unrar / Unzip) from the downloaded *.exe

* Copy nk.nbf from the 2003SE ROM to the "??Your_DIR??\Downgrade to WM2003SE" folder.

3.

Prep your WM5 device by formating Storage and Hive.

*

Press Power + Softreset, and when the colored stripes (well, this is the bootscreen :) )shows on the screen.

If you have a PH20B device such as MDAIII, QTEK 9090, XDAIIs, PDA2K etc.

o Quickly press Record+Camera before the versions appears at bottom right

o OR, press Power+Softreset+Camera+Record at the same time.

If you have a PH20B1 device such as SX66

o Quickly press Record+Windows Media before the versions appears at bottom right

o OR, press Power+Softreset+Windows Media Player button+Record at the same time.

* Either way mentioned above should work.

*

You'll see three options; change the second and the third to "yes".

If you have a PH20B device such as MDAIII, QTEK 9090, XDAIIs, PDA2K etc.

o You can do that with the camera and the record buttons.

If you have a PH20B1 device such as SX66

o You can do that with the Windows Media Player and the record buttons.

* If you are done, press the mail button, it'll show a white screen for a while, just wait.

* If the bootscreen, aka. the colored stripes is displayed, Wait more, you are booting.

* The welcome screen to set up your device should appear soon.

4.

Setup your device

* Follow the instructions on the screen.

5.

Stop activesync.

* Right click on taskbar -> Task Manager.

* End the following processes: rapimgr.exe, outlook.exe, winword.exe, wcescomm.exe, wcesmgr.exe

6.

Put your device into bootloader mode.

* Press Power + record (above the volume slider) + softreset at the same time.

* You should see a white screen with "Serial" text on it and the Bootloader version.

* Put your device into the cradle

* Make sure that the charger of your PDA is connected to the cradle.

* The text should change to "USB" now.

7.

Run the Downgrade

* Change to the "??Your_DIR??\Downgrade to WM2003SE" folder.

* Run the MaUpgradeUt__NoId.exe.

* It should recognize your device in 10-15 seconds.

* You'll see the new ROM version that you have chosen.

* Press next

* The downgrade process should begin in a few moments. It'll take about 10 minutes.

8.

Setup your device

* Follow the instructions on the screen.

9.

Setup Activesync Partnership on your PC.

* Put your device into the cradle

* Pair and but don't sync your device.

10.

Evaluate if you need an Extended_Rom on your CE2003

* IF you have NOT resized your Extended_ROM on the upgrade to WM5 and had 43MB Storage go to B) or C)

*

IF you will not be needing the Extended_Rom on your SE2003 as you install the cabs by hand and would like to use that space as storage then go to D)

A) Creating a Exteneded_Rom (16MB Default)

o If you did resize your storage and had over 43MB (60 was default) on your WM5 Device

o You will need to create a Extended Rom that is at least 16MB

o This will fit any Exteneded roms (ms.nbf) that you would like to flash back or any coooked versions.

o You will have your Extended_ROM back, however it will be seen forever

(You can not lock it once you've unlocked and resized it cause the resizing tool resets the Extended_ROM password.)

o Copy Repart_DOC.exe from the "Preparation\DOC repartitioning tool" folder to your device and launch it.

o Set size to 16348 (should this be 16384?? 16*1024=16384)

o Press "Format now!" and wait until it is done (A few seconds). You will see a message that it is done.

o Soft reset.

o Choose option B) or C)

B) Flashing back the Extended Rom

o Copy ms_.nbf to the "Downgrade to WM2003SE" folder (you Must delete nk.nbf)

o Now, repeat steps 5-7.

o Skip the rest, go to 11

C) Copying a cooked version of the Extended Rom (Custom Files)

o Copy the Cooked Cabs to the Extended_Rom folder on your device

o Insure that you have the correct version autorun.exe and config.txt

o Soft reset

o Skip the rest, go to 11

D) Using the Extended rom as storage space.

o If you want to use the Extended_ROM space as added storage space on your CE2003

o Copy Repart_DOC.exe from the "Preparation\DOC repartitioning tool" folder to your device and launch it.

o Set size to ??

o Press "Format now!" and wait until it is done (A few seconds). You will see a message that it is done.

o Soft reset.

11.

Test the device

* Check the phone.

* Check your Regional settings.

* Check the time.

12.

Setup Activesync Partnership on your PC.

* Put your device into the cradle

* Pair and but don't sync your device.

13.

Reload applications

* Reload all your applications.

* Sync your data from outlook.