2. Okay, so I can add the meta info for a given card into a meta.txt file in the root of my TomTom.
3. What I mean is that the 890-maps are not automatically patched anymore provided that the built-in FastActivate does not have the specific meta. I would have to use the new(er) FastActivate 1.8.8.9 additionaly.
5. Correction: FA v1.8.8.9 can activate most recent maps provided that the meta has been built-in.
Because the built-in meta data are more recent than in older FA versions.
FA can use Meta.txt files in the root of the TT which contain newer data and so activate maps.
6. See point 2.
Thanks you for your quick reply !