Hi,
I downloaded the actual ROM from the following site:
http://www.samsungmobile.com/support/omnia/index.jsp
(My instructions that follow are based on Vista OS. There is a different process, I believe, for XP OS.)
Selected the following:
Country: UK
OS: Vista
On the next screen I entered the version as ACHI1 and clicked on OK.
You need to have Windows Mobile Device centre installed and the Omnia must be charged to around 75%
You will need a registry editor on the Omnia as you need to edit the following registry entry:
HKCU > Current User > Control Panel > Version
Edit the value from your current version to
ACHI1
Now you can close the registry editor and then plug your phone into the data cable which should be connected to the PC where the ROM update file that you have downloaded is saved.
You then run the file that you have downloaded (in my case it was
i900ACHJ2_updater_vista.exe)
This will now install the new ROM.
Once the ROM is installed you can struggle to get your screen aligned and the enjoy a much extended battery life.
I have absolutely no regrets after installing this ROM.
Hope this helps.
Jay