Sorry but you can't, your Jazz2 OEM version came bundled with some hardware and it can't be updated to 1.23.

You have to buy Jazz2 original in stores (if you still can find it) or order it directly from Gathering of Developers.

If you live in Europe you should get Jazz 2 version 1.20 (upgradeable to 1.23).

If you live in America then you should get Jazz 2 version 1.22 (upgradeable to 1.23).

I got both anyways.

Both are the same, they work with eachother when they're patched to 1.23.