It looks like the file downloaded via Samsung Mobile web site is the same for all countries. I tried 4 so far, all linked to the same files:

Process is:

1. Install ActiveSync 4.5
2. Install modem drivers
3. Connect i600
4. Run updater.

I’d highly recommend reading full instructions on Samsung Mobile site, as I take no responsibility if you brick your device. Keep in mind Vista is not supported.