I'm in the process of adding Red light/speedcam poi's to my map DVD and updating the OS as per the POISON thread and after searching around have noticed where some people have edited one of the settings in the Nav menu (language?) to act as an ON/OFF toggle for the voice alert when approaching a speedcam POI. Could someone please explain exactly how to set this function up?

I have patched my navboot and updated the voice files to alert as per the POISON thread and have also renamed usa_f.csf to gb_f.csf and vice versa so as to have the British female spoken voice but not change the USA text, etc.

Also, when editing text strings in navtweak, is it necessary to make any other changes elsewhere for the changes to be useable? ie, changing accept screen text or menu descriptors, etc.

TIA!