I've just managed to flash my Italian (TIM) i600 (i600AIGB1) with i600XXGA2. It works perfect and has the carousel
So here are the steps:
1. Execute the 'BJ3Open_Rev15_XXGA2.exe' file from your PC
(Please note, do not connect the device to the phone yet.)
2. Make sure the device is powered off and then connect to PC via USB cable.
3. Change the device to "Downloader mode" by holding down the power key, right side soft key (RSK) and the Camera key on the right hand side of your phone together.
4. Press the Start button on the 'BJ3Open_Rev15_XXGA2.exe' application, you'll see it run through some tests and start to transfer the ROM.
5. Wait until the process is done.
6. In case of failed downloading, you just need to re-flash again.