[JAM, MDA Compact, S100 Software Upgrading] BeyondtheTech:
First of all, I'd like to say that I performed Anansky's BigStorage upgrade without a hitch on my 850MHz JAM running on Cingular's network. The only concern was that the device was reporting itself as a PM10A instead of a PM10C.

Precautions:

1. Use the write-protect feature on your SD card in the unlikely event that Windows or your PocketPC wishes to write or format it.

2. Use a smaller SD card, as the steps will create a ROM file as big as your card, and it'll take a while to load the file to make changes, update the SD card, etc.

3. Burn a copy of your downloaded ROM file to a CD for safety purposes.

4. Always keep your PocketPC charged either through your PC's USB port, or through a USB-to-AC adapter.

For those who want a quick rundown on how I did it:

1. From the FTP, download NTRW.EXE (version 2.0), ROMUPDATE.EXE, and MAGICIAN_OS1.11WWE_BIGSTORAGE_6.ZIP.

2. With your JAM connected via USB to your PC, disable ActiveSync's connections.

3. Enter the Bootloader and backup your entire ROM to your SD card using ROMUPDATE.EXE.

4. Read the contents of your SD card into a ROM file using NTRW.EXE. (Note that Administrator priviliges are required on your Windows account in order to read/write to the card)

5. Modify the first 416 decimal bytes of the OS1.11WWE_BIGSTORAGE.NB1 (extracted from the ZIP file) by using the first 416 decimal bytes from your ROM file.

6. Write the newly modified ROM file onto your SD card using NTRW.EXE.

7. Enter the Bootloader with the SD card inserted and flash the newly modified ROM to your device.

Notes:

1. I was able to reflash the official i-mate CE ROM (1.11) and Radio, thinking I'd force 850MHz support back into the device in the uncertain event it lost it during Anansky's upgrade. However:[list:44fd36694d]1. The Radio can't be flashed without the CE ROM being flashed alone first.

2. Any reflashing of the Radio or the CE ROM will lose your newly acquired 27MB Storage area. The Device Information applet will report a crazy value for the Storage area when in fact it's totally gone. The only way to restore it is to put your backed up old ROM image onto the SD card and perform the flash from the card.

2. The only way to find out how the hack was done is to look at the different versions of the hack and compare them byte-by-byte to the official updaters.

3. Perhaps one can perform another full SD-to-ROM backup with Anansky's upgrade and compare the files as well, then inject the compatible ROM portions and leave his hack in place.

4. Reflashing any of the ROM portions did NOT restore my model back to PM10C, which leads me to believe that it's outside that region untouched by the official flash utility.

5. I was only able to reflash with the official ROM updaters AND the hacked MaUpgradeUt_noID.exe from the FTP, and while it was in Bootloader mode only.

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Lastly, I restored my original ROM image in its entirety and will try again sometime in the future to see if I can incorporate the 850MHz ROM into Anansky's hack. It was nice having the extra 27MB free for a short while, but until he comes back or someone else figures it all out, it'll be a risky endeavour in the event of another official ROM upgrade.