safeworld4women wrote:
What I am trying for the last days is to install G5 and new templates on an existing backup-ed install of our current site - as a trial to see how if the modules and positions can be matched up.
In other words - if modules have a position - say of - Sidebar A - is it possible to move existing modules - on bulk - to the new mod positions in G5.
I am slowly testing how to do this to see if it is possible. If it works then thats one issue solved!
Then I can look more specifically at 'more advanced' problems like the Modules Anywhere thing.
I like the challenge though!
You have a tough task ahead of you - good that you like challenges 
You actually should open a new Topic for this as it is a Salient (ha-ha) issue.
The stumbling block is that Gantry 5 requires a Module Position Particle to represent a module position in the Layout. Gantry 4 had no such animal.
Having said that, off the top of my head if it were me doing it I would recreate all the Module Position Particles that I need for the Gantry 4 setup. This part of the prototyping would go fast as there is no content to worry about.
Once all the module position's were setup I would use
Adminer
or PhPMyAdmin console to export the Gantry 4 content data into my Gantry 5 template.
This should then display all the modules you had in Gantry 4 correctly. Create a new Topic and we'll continue there - as a former pen weilding cross word puzzle addict I too like challenges.