@Fran
Welcome to GPS Power.

US and EU variants of Alpha 100 use the same firmware and share the same HWID of 1562. Regional variations are made in the device at the time of manufacture and are quite independent of the firmware as they're tied to regionally allowed radio frequencies. Similar differences are done with the regional collars. You can obtain the latest version of Alpha 100's fw by going to the page linked in Post #1 above, right-clicking there and selecting "View Source" or similar (browser dependent). You can then copy the link to obtain the GCD file.

Due to the [Only registered and activated users can see links. ], we cannot help with anything which breaches Garmin's EULAs and that includes hacking their devices. Speaking of rules, you are an inactivated member and should have made your first post in [Only registered and activated users can see links. ] section as an introduction thread. Click the tan button there, "+ Post New Thread". Your account will then be activated by admin staff.