No, I did not copied anything to nuvi for sure. I just deleted gmapsupp.img of Western Europe and some voices.And gmapbmap.img remained untouched on it, as well as *.sum files of gmapbmap and gmapsupp. It seems that just a lack of gmapsupp.img or voices caused non booting.
So, do you still think that I should try with a cure firmware and is it many risky or to try something other ?
Thank you