N67 dump decoder
If you have an Alfa Romeo 145, 146, 155, 164, GTV or Spider and have dumped the EEPROM from the receiver module you can use this tool to decode it. This can be used to get the unlock code that will allow new keys to be added. If you want to know how to dump the EEPROM from your car first, follow the 'Dump N67 Memory guide'.
The tool will also show you the structure of the memory. With this knowledge it is possible to edit the memory using a Hex editor. This can allow you to reorder keys which can be useful if your alarm has got out of sync with the central locking unit.
The code has been worked out experimentally and may be wrong. Please use at your own risk.